fix(heal): cleanup consumed MRF replay journals

Do not retain Accepted or Merged replay intents as startup anchors after they have been handed to the heal manager. Only refused or still-pending replay records keep the journal on disk until a successor snapshot can persist them.

This keeps successor snapshots limited to the pending queue, which lets successful replay remove both authoritative and legacy journal paths and restores the crash-boundary tests around successor flush.

Co-Authored-By: heihutu <heihutu@gmail.com>

Co-Authored-By: zhi22915 <qiuzgang@gmail.com>
(cherry picked from commit d5b8f49c9d)

.config/e2e-full-selection.txt

@@ -1,2 +1,2 @@
-sha256-darwin=53b05ac745905809d3828c6994bdd8ecf9d20b2b61a8a9d80fe15eb62f932193
+sha256-darwin=dd14f49a7b0e2c156b4457fdd836499d837890d3e439689a4eff9e8875ee2f5b
 sha256-linux=7c892afa4b9d1591b46bd79c976b647109a277284fddb3b98edced4b0297eda2

.config/e2e-smoke-selection.txt

@@ -1 +1 @@
-sha256=5db88c6fec94d4f269c7d9cfc128bd2adc27b3d7021127e2fa0b1daccc5f900f
+sha256=6d18f9cce820c51d5589de944e8cc185f73eeca0ea9a9916651943e3759169d0

.config/security-smoke-floor.txt

@@ -9,4 +9,4 @@
 # if the selected count drops below this number, so a rename or removal that
 # thins the security smoke gate must update this file in the same PR.
 # Adding tests does not require a bump, but bumping keeps the guard tight.
-18
+26

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Security
+- **Presigned URLs honour only signed headers** (GHSA-g8w9-qw9q-fghr): a SigV4 presigned request that carries an `x-amz-*` request header not listed in `X-Amz-SignedHeaders` is now rejected with `403 AccessDenied` ("There were headers present in the request which were not signed"), matching AWS S3. Previously the holder of a presigned `PutObject` URL could add unsigned `x-amz-tagging`, `x-amz-storage-class`, `x-amz-website-redirect-location`, ACL, metadata, Object Lock or SSE headers and have them applied. Presigners that intend a property must set it before signing so the SDK lists the header in `SignedHeaders`; `x-amz-cf-id` (CloudFront) remains tolerated unsigned. Header-signed SigV4 and SigV2 requests are unchanged.
+
 ### Fixed
 - **Multipart admission queue**: an `UploadPart` waiting for a foreground write permit now waits at most 10 s by default (`RUSTFS_PUT_MULTIPART_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS`, previously 30 s), so a queued part returns S3 `SlowDown` before the client's socket write timeout drops the connection. Separately, the API listener no longer forces a 4 MiB `SO_RCVBUF` on every accepted socket (kernel autotuning applies; `RUSTFS_HTTP_SOCKET_RECV_BUFFER_BYTES` restores a fixed size), so a queued part no longer lets up to 8 MiB of unread body accumulate in kernel memory per connection, which is what throttled whole nodes under SDK-default multipart concurrency. Fixes #7385.
 - **Helm Ingress**: `customAnnotations` are now merged with class-specific annotations (nginx/traefik) instead of being ignored when `ingress.className` is set.

crates/e2e_test/src/presigned_negative_test.rs

@@ -356,3 +356,238 @@ async fn tampered_presigned_put_returns_signature_does_not_match() -> Result<(),
     );
     Ok(())
 }
+
+/// GHSA-g8w9-qw9q-fghr: a presigned PUT signed with `SignedHeaders=host` must
+/// not honour `x-amz-*` headers the uploader adds afterwards. The presign
+/// authorised one plain upload; the extra headers would set tags, storage
+/// class and a website redirect the presigner never covered. AWS S3 rejects
+/// this with 403 `AccessDenied`, and so must RustFS — and the object must not
+/// be stored at all, not merely stored without the properties.
+#[tokio::test]
+async fn ghsa_g8w9_presigned_put_rejects_unsigned_x_amz_headers() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    let mut env = RustFSTestEnvironment::new().await?;
+    setup(&mut env).await?;
+
+    let key = "presigned-put-unsigned-amz-headers.txt";
+    let pr = env
+        .create_s3_client()
+        .put_object()
+        .bucket(BUCKET)
+        .key(key)
+        .presigned(valid_config())
+        .await?;
+    assert!(
+        !pr.headers().any(|(name, _)| name.eq_ignore_ascii_case("x-amz-tagging")),
+        "fixture must presign a plain PutObject without tagging so the header below is unsigned"
+    );
+
+    let unsigned: Vec<(&str, &str)> = vec![
+        ("x-amz-tagging", "owner=attacker&classification=public"),
+        ("x-amz-website-redirect-location", "https://attacker.example/phish"),
+        ("x-amz-storage-class", "REDUCED_REDUNDANCY"),
+    ];
+    let headers = pr.headers().chain(unsigned.iter().copied());
+    let resp = send_raw(pr.method(), pr.uri(), headers, Some(b"should-not-be-stored".to_vec())).await?;
+    let status = resp.status();
+    let body = resp.text().await?;
+    assert_eq!(
+        status.as_u16(),
+        403,
+        "presigned PUT with unsigned x-amz-* headers must be 403, body:\n{body}"
+    );
+    assert_error_code(&body, "AccessDenied");
+    assert!(
+        body.contains("were not signed"),
+        "rejection must name unsigned headers as the cause, got:\n{body}"
+    );
+
+    let error = env
+        .create_s3_client()
+        .head_object()
+        .bucket(BUCKET)
+        .key(key)
+        .send()
+        .await
+        .expect_err("presigned PUT with unsigned x-amz-* headers must not store the object");
+    assert_eq!(
+        error.raw_response().map(|response| response.status().as_u16()),
+        Some(404),
+        "absence probe after the rejected upload must return HTTP 404, got {error:?}"
+    );
+    Ok(())
+}
+
+/// GHSA-g8w9-qw9q-fghr positive control: when the presigner itself sets the
+/// property, the SDK lists `x-amz-tagging` in `SignedHeaders`, the uploader
+/// replays it, and the upload succeeds with the tags applied. Without this the
+/// negative test above could pass because the server rejects every tagged
+/// presigned upload.
+#[tokio::test]
+async fn ghsa_g8w9_presigned_put_accepts_signed_x_amz_headers() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    let mut env = RustFSTestEnvironment::new().await?;
+    setup(&mut env).await?;
+
+    let key = "presigned-put-signed-tagging.txt";
+    let pr = env
+        .create_s3_client()
+        .put_object()
+        .bucket(BUCKET)
+        .key(key)
+        .tagging("owner=app")
+        .presigned(valid_config())
+        .await?;
+    assert!(
+        pr.headers().any(|(name, _)| name.eq_ignore_ascii_case("x-amz-tagging")),
+        "fixture must carry x-amz-tagging as a signed header"
+    );
+    assert!(
+        pr.uri().contains("x-amz-tagging"),
+        "X-Amz-SignedHeaders must list x-amz-tagging, uri: {}",
+        pr.uri()
+    );
+
+    let resp = send_presigned(&pr, Some(b"stored-with-signed-tagging".to_vec())).await?;
+    let status = resp.status();
+    let body = resp.text().await?;
+    assert!(
+        status.is_success(),
+        "presigned PUT with signed x-amz-tagging must succeed, got {status}, body:\n{body}"
+    );
+
+    let tags = env
+        .create_s3_client()
+        .get_object_tagging()
+        .bucket(BUCKET)
+        .key(key)
+        .send()
+        .await?;
+    let tag_set: Vec<(String, String)> = tags
+        .tag_set()
+        .iter()
+        .map(|tag| (tag.key().to_string(), tag.value().to_string()))
+        .collect();
+    assert_eq!(tag_set, vec![("owner".to_string(), "app".to_string())], "signed tagging must be applied");
+    info!("signed presigned tagging control passed");
+    Ok(())
+}
+
+/// GHSA-g8w9-qw9q-fghr on the read side: a presigned GET signed with
+/// `SignedHeaders=host` must not accept an unsigned SSE-C header. The header
+/// would otherwise select a decryption path the presigner never authorised.
+#[tokio::test]
+async fn ghsa_g8w9_presigned_get_rejects_unsigned_x_amz_headers() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    let mut env = RustFSTestEnvironment::new().await?;
+    setup(&mut env).await?;
+
+    let pr = env
+        .create_s3_client()
+        .get_object()
+        .bucket(BUCKET)
+        .key(CANONICAL_KEY)
+        .presigned(valid_config())
+        .await?;
+
+    let unsigned: Vec<(&str, &str)> = vec![("x-amz-server-side-encryption-customer-algorithm", "AES256")];
+    let headers = pr.headers().chain(unsigned.iter().copied());
+    let resp = send_raw(pr.method(), pr.uri(), headers, None).await?;
+    let status = resp.status();
+    let body = resp.text().await?;
+    assert_eq!(
+        status.as_u16(),
+        403,
+        "presigned GET with an unsigned x-amz-* header must be 403, body:\n{body}"
+    );
+    assert_error_code(&body, "AccessDenied");
+    assert!(
+        !body.contains(std::str::from_utf8(CANONICAL_BODY)?),
+        "rejected GET must not leak the object body"
+    );
+    Ok(())
+}
+
+/// GHSA-g8w9-qw9q-fghr: an unsigned `x-amz-copy-source` would turn a presigned
+/// PutObject into a CopyObject of an arbitrary readable key, since operation
+/// routing happens before authorization. The presigned upload must fail and
+/// leave nothing behind.
+#[tokio::test]
+async fn ghsa_g8w9_presigned_put_rejects_unsigned_copy_source() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    let mut env = RustFSTestEnvironment::new().await?;
+    setup(&mut env).await?;
+
+    let key = "presigned-put-unsigned-copy-source.txt";
+    let pr = env
+        .create_s3_client()
+        .put_object()
+        .bucket(BUCKET)
+        .key(key)
+        .presigned(valid_config())
+        .await?;
+
+    let copy_source = format!("/{BUCKET}/{CANONICAL_KEY}");
+    let unsigned: Vec<(&str, &str)> = vec![("x-amz-copy-source", copy_source.as_str())];
+    let headers = pr.headers().chain(unsigned.iter().copied());
+    let resp = send_raw(pr.method(), pr.uri(), headers, None).await?;
+    let status = resp.status();
+    let body = resp.text().await?;
+    assert_eq!(
+        status.as_u16(),
+        403,
+        "presigned PUT with an unsigned copy source must be 403, body:\n{body}"
+    );
+    assert_error_code(&body, "AccessDenied");
+
+    let error = env
+        .create_s3_client()
+        .head_object()
+        .bucket(BUCKET)
+        .key(key)
+        .send()
+        .await
+        .expect_err("rejected copy must not create the destination object");
+    assert_eq!(error.raw_response().map(|response| response.status().as_u16()), Some(404));
+    Ok(())
+}
+
+/// GHSA-g8w9-qw9q-fghr boundary control: the rule covers `x-amz-*` only. A
+/// plain `Content-Type` on a `SignedHeaders=host` presigned PUT is outside
+/// SigV4's signed-header requirement (AWS S3 accepts it too) and must keep
+/// working, so the negative tests above cannot pass by rejecting every
+/// unsigned header.
+#[tokio::test]
+async fn ghsa_g8w9_presigned_put_still_accepts_unsigned_non_amz_headers() -> Result<(), Box<dyn std::error::Error + Send + Sync>>
+{
+    init_logging();
+    let mut env = RustFSTestEnvironment::new().await?;
+    setup(&mut env).await?;
+
+    let key = "presigned-put-unsigned-content-type.txt";
+    let pr = env
+        .create_s3_client()
+        .put_object()
+        .bucket(BUCKET)
+        .key(key)
+        .presigned(valid_config())
+        .await?;
+
+    let unsigned: Vec<(&str, &str)> = vec![("content-type", "text/x-rustfs-test")];
+    let headers = pr.headers().chain(unsigned.iter().copied());
+    let resp = send_raw(pr.method(), pr.uri(), headers, Some(b"plain-header-upload".to_vec())).await?;
+    let status = resp.status();
+    let body = resp.text().await?;
+    assert!(
+        status.is_success(),
+        "presigned PUT with an unsigned Content-Type must succeed, got {status}, body:\n{body}"
+    );
+
+    let head = env.create_s3_client().head_object().bucket(BUCKET).key(key).send().await?;
+    assert_eq!(
+        head.content_type(),
+        Some("text/x-rustfs-test"),
+        "unsigned Content-Type must still be applied"
+    );
+    Ok(())
+}

docs/testing/security-regressions.md

@@ -17,13 +17,14 @@ Every fixed RustFS GitHub Security Advisory maps to at least one named regressio
 | [GHSA-v9cp-qfw9-9pfp](https://github.com/rustfs/rustfs/security/advisories/GHSA-v9cp-qfw9-9pfp) | `ForAllValues:`/`ForAnyValue:` negated string operators applied negation to the aggregate instead of the per-value predicate | fixed, GHSA private-fork merge | `ghsa_v9cp_for_all_values_not_equals_partial_overlap`, `ghsa_v9cp_for_any_value_not_equals_partial_overlap` and the absent-key/positive-quantifier cases beside them (`crates/policy/tests/quantified_negation.rs`); the value set must partially overlap the policy set, since contained or disjoint sets cannot tell the quantifiers apart | crate test |
 | [GHSA-6r96-hmgc-726c](https://github.com/rustfs/rustfs/security/advisories/GHSA-6r96-hmgc-726c) | Request headers must not populate server-derived IAM condition keys (`userid`, `groups`, `jwt:`/`ldap:` claims) | fixed, GHSA private-fork merge | `ghsa_6r96_identity_condition_keys_ignore_spoofed_headers`, `ghsa_6r96_claim_condition_keys_ignore_spoofed_headers`, and `test_request_headers_still_reach_conditions`, which keeps the reserved set from growing too broad (`rustfs/src/auth.rs`) | unit |
 | [GHSA-x298-9x87-fvjq](https://github.com/rustfs/rustfs/security/advisories/GHSA-x298-9x87-fvjq) | Anonymous ListObjectVersions -> `s3:ListBucket` fallback must reach the same public-access gates as a direct grant | fixed, GHSA private-fork merge | `ghsa_x298_anonymous_list_object_versions_denied_when_restrict_public_buckets_enabled` (`crates/e2e_test/src/anonymous_access_test.rs`); asserts 200 before the public-access block is applied so it proves the gate, not a broken fallback | e2e (`e2e-smoke`) |
+| [GHSA-g8w9-qw9q-fghr](https://github.com/rustfs/rustfs/security/advisories/GHSA-g8w9-qw9q-fghr) | A SigV4 presigned request must reject `x-amz-*` headers missing from `X-Amz-SignedHeaders` (tags, storage class, ACL, metadata, redirect, Object Lock, SSE) instead of applying them | this fix | `ghsa_g8w9_presigned_request_rejects_unsigned_x_amz_headers`, `ghsa_g8w9_presigned_request_accepts_signed_or_exempt_x_amz_headers`, `ghsa_g8w9_check_ignores_header_signed_sigv2_and_anonymous_requests` (`rustfs/src/auth.rs`); `ghsa_g8w9_check_access_rejects_unsigned_amz_header_on_presigned_custom_route` for routes that bypass `S3Access::check` (`rustfs/src/admin/router.rs`); `ghsa_g8w9_presigned_put_rejects_unsigned_x_amz_headers`, `ghsa_g8w9_presigned_get_rejects_unsigned_x_amz_headers`, `ghsa_g8w9_presigned_put_rejects_unsigned_copy_source`, plus the signed-tagging control `ghsa_g8w9_presigned_put_accepts_signed_x_amz_headers` and the unsigned-`Content-Type` boundary control `ghsa_g8w9_presigned_put_still_accepts_unsigned_non_amz_headers` (`crates/e2e_test/src/presigned_negative_test.rs`) | unit; e2e (`e2e-smoke`) |
 | [GHSA-g3vq-vv42-f647](https://github.com/rustfs/rustfs/security/advisories/GHSA-g3vq-vv42-f647) | FTPS `MKD` must clear the `s3:CreateBucket` authorization boundary before reaching the backend | fixed, GHSA private-fork merge | `ghsa_g3vq_mkd_denied_before_reaching_backend` (`crates/protocols/src/ftps/driver.rs`); primes `create_bucket` to succeed so the assertion distinguishes "denied at authorization" from "backend refused" | unit (`ftps` feature) |
 
 ## Where these run
 
 | Layer | Command | Lane | Guard |
 | --- | --- | --- | --- |
-| Unit and crate tests (`ghsa_r5qv_*`, the m77q pins, `ghsa_5354_*`, `ghsa_3ppv_*`, `ghsa_6r96_*`, `ghsa_v9cp_*`, `ghsa_g3vq_*`) | `cargo nextest run --profile ci --all --exclude e2e_test` | every PR, `Test and Lint` (required) | none needed; the workspace pass runs every unit and crate test |
+| Unit and crate tests (`ghsa_r5qv_*`, the m77q pins, `ghsa_5354_*`, `ghsa_3ppv_*`, `ghsa_6r96_*`, `ghsa_v9cp_*`, `ghsa_g3vq_*`, `ghsa_g8w9_*`) | `cargo nextest run --profile ci --all --exclude e2e_test` | every PR, `Test and Lint` (required) | none needed; the workspace pass runs every unit and crate test |
 | S3-API negative-auth e2e (`negative_sigv4_test`, `presigned_negative_test`, `admin_auth_test`) | `cargo nextest run --profile e2e-smoke -p e2e_test` | every PR, `End-to-End Tests` (report-only) | `scripts/check_security_smoke_count.sh` with the floor in `.config/security-smoke-floor.txt`, run in the `e2e-tests` job; fails when a rename drops one of these modules out of the smoke filter |
 | Other S3 e2e guards (`anonymous_access_test`) | `cargo nextest run --profile e2e-smoke -p e2e_test` | every PR, `End-to-End Tests` (report-only) | `scripts/check_test_wiring.py --check-profile e2e-smoke` digest |
 | Protocol e2e (`protocols::test_protocol_core_suite`, GHSA-3p3x) | `RUSTFS_BUILD_FEATURES=ftps,webdav,sftp cargo nextest run -j 1 --profile e2e-protocols -p e2e_test` | nightly, `e2e-replication-nightly.yml` job `protocols-nightly`; not PR-gated | `scripts/check_test_wiring.py --check-profile e2e-protocols` digest |

rustfs/src/admin/router.rs

@@ -34,7 +34,7 @@ use crate::admin::runtime_sources::{
 };
 use crate::admin::storage_api::access::{ReqInfo, authorize_request, spawn_traced};
 use crate::admin::storage_api::contract::bucket::{BucketOperations, BucketOptions};
-use crate::auth::{check_key_valid, constant_time_eq, get_session_token};
+use crate::auth::{check_key_valid, constant_time_eq, get_session_token, reject_unsigned_amz_headers_on_presigned_request};
 use crate::error::ApiError;
 use crate::license::license_check;
 use crate::server::{
@@ -3269,6 +3269,11 @@ where
 
     // check_access before call
     async fn check_access(&self, req: &mut S3Request<Body>) -> S3Result<()> {
+        // GHSA-g8w9-qw9q-fghr: custom routes bypass `S3Access::check`, so the
+        // presigned signed-header rule is enforced here as well. A request
+        // without a presigned signature passes through untouched.
+        reject_unsigned_amz_headers_on_presigned_request(&req.headers, req.uri.query())?;
+
         if let Some(server_ctx) = &self.server_ctx {
             req.extensions.insert(server_ctx.clone());
             if !is_public_health_path(req.uri.path()) && server_ctx.installed_app_context().is_none() {
@@ -5611,6 +5616,38 @@ mod tests {
         assert_eq!(err.code(), &S3ErrorCode::AccessDenied);
     }
 
+    /// GHSA-g8w9-qw9q-fghr: custom routes must apply the presigned
+    /// signed-header rule too, since they never reach `S3Access::check`.
+    #[tokio::test]
+    async fn ghsa_g8w9_check_access_rejects_unsigned_amz_header_on_presigned_custom_route() {
+        let router: S3Router<AdminOperation> = S3Router::new(false);
+        let mut headers = HeaderMap::new();
+        headers.insert("x-amz-tagging", HeaderValue::from_static("owner=attacker"));
+        let mut req = S3Request {
+            input: Body::from(String::new()),
+            method: Method::GET,
+            uri: "/demo-bucket?replication-metrics&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20260827T000000Z&X-Amz-Expires=900&X-Amz-SignedHeaders=host&X-Amz-Credential=test%2F20260827%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=signature"
+                .parse()
+                .expect("uri should parse"),
+            headers,
+            extensions: http::Extensions::new(),
+            credentials: Some(s3s::auth::Credentials {
+                access_key: "test".into(),
+                secret_key: s3s::auth::SecretKey::from("secret".to_string()),
+            }),
+            region: None,
+            service: None,
+            trailing_headers: None,
+        };
+
+        let err = router
+            .check_access(&mut req)
+            .await
+            .expect_err("presigned custom-route request with an unsigned x-amz header must be denied");
+        assert_eq!(err.code(), &S3ErrorCode::AccessDenied);
+        assert_eq!(err.message(), Some(crate::auth::UNSIGNED_HEADERS_MESSAGE));
+    }
+
     // backlog#1052 S2: the router hands its server's context slot to every
     // dispatched request via extensions, so the static admin operations can
     // resolve their server's store instead of the process default.

rustfs/src/auth.rs

@@ -50,6 +50,7 @@ const EVENT_KEYSTONE_CREDENTIALS_DETECTED: &str = "keystone_credentials_detected
 const EVENT_KEYSTONE_CREDENTIALS_VALIDATED: &str = "keystone_credentials_validated";
 const EVENT_KEYSTONE_CONTEXT_MISSING: &str = "keystone_context_missing";
 const EVENT_SESSION_TOKEN_EXTRACTION: &str = "session_token_extraction";
+const EVENT_PRESIGNED_UNSIGNED_AMZ_HEADER: &str = "presigned_unsigned_amz_header";
 
 /// RustFS-specific query capability for a single presigned PutObject request.
 pub(crate) const RUSTFS_MAX_CONTENT_LENGTH_QUERY: &str = "x-rustfs-max-content-length";
@@ -1031,6 +1032,102 @@ pub fn get_query_param<'a>(query: &'a str, param_name: &str) -> Option<&'a str>
     None
 }
 
+/// `x-amz-*` request headers a SigV4 presigned request may carry without
+/// listing them in `X-Amz-SignedHeaders`.
+///
+/// CloudFront stamps `x-amz-cf-id` on every origin request it forwards, so a
+/// presigned URL served through a CDN could never be honoured if that header
+/// had to be signed; nothing in RustFS reads it, so it cannot change what the
+/// request does.
+const PRESIGNED_UNSIGNED_AMZ_HEADER_ALLOWLIST: &[&str] = &["x-amz-cf-id"];
+
+pub(crate) const UNSIGNED_HEADERS_MESSAGE: &str = "There were headers present in the request which were not signed";
+
+/// GHSA-g8w9-qw9q-fghr: reject `x-amz-*` request headers that a SigV4 presigned
+/// URL did not sign.
+///
+/// A presigned URL is a bounded capability: the presigner authorises one
+/// method, key, expiry and the header set named in `X-Amz-SignedHeaders`. The
+/// upstream verifier only proves that the signed headers match; any other
+/// `x-amz-*` header (tagging, storage class, ACL, metadata, website redirect,
+/// Object Lock, SSE selection) would still reach the handlers and take effect,
+/// so the untrusted holder of an upload URL could set object properties the
+/// presign never covered. AWS S3 rejects such a request with `AccessDenied`
+/// ("There were headers present in the request which were not signed"); this
+/// check mirrors that at the access boundary, before any handler reads a
+/// header.
+///
+/// Only query-string SigV4 requests are checked. SigV2 canonicalises every
+/// `x-amz-*` header into the string to sign, so adding one there already breaks
+/// the signature, and a header-signed SigV4 request is sent by the credential
+/// holder itself, so an unsigned header there is not a delegation bypass.
+///
+/// Detection keys on the query, not on the derived [`AuthType`], because the
+/// upstream verifier dispatches to the presigned path whenever the query
+/// carries `X-Amz-Signature`, even if an `Authorization` header is present too.
+/// The rule relies on the verifier signing every query parameter except the
+/// signature itself, so neither `X-Amz-SignedHeaders` nor a property-carrying
+/// query parameter can be added after presigning.
+pub(crate) fn reject_unsigned_amz_headers_on_presigned_request(header: &HeaderMap, query: Option<&str>) -> S3Result<()> {
+    let Some(query) = query else {
+        return Ok(());
+    };
+
+    // Presence detection is case-insensitive so a query the upstream verifier
+    // would not treat as presigned still fails closed here; the signed list is
+    // read with the exact key the verifier uses (`X-Amz-SignedHeaders`, unique),
+    // so both sides always see the same list. A duplicate or missing key
+    // yields an empty list, which signs nothing.
+    let mut is_presigned_v4 = false;
+    let mut signed_headers: Option<String> = None;
+    let mut duplicate_signed_headers = false;
+    for (name, value) in form_urlencoded::parse(query.as_bytes()) {
+        if name.eq_ignore_ascii_case("x-amz-signature") {
+            is_presigned_v4 = true;
+        } else if name == "X-Amz-SignedHeaders" {
+            if signed_headers.is_some() {
+                duplicate_signed_headers = true;
+            }
+            signed_headers = Some(value.into_owned());
+        }
+    }
+    if !is_presigned_v4 {
+        return Ok(());
+    }
+    if duplicate_signed_headers {
+        signed_headers = None;
+    }
+
+    let signed: Vec<String> = signed_headers
+        .as_deref()
+        .unwrap_or_default()
+        .split(';')
+        .map(|name| name.trim().to_ascii_lowercase())
+        .filter(|name| !name.is_empty())
+        .collect();
+
+    for name in header.keys() {
+        // `HeaderName` is already lowercase.
+        let name = name.as_str();
+        if !name.starts_with("x-amz-") || PRESIGNED_UNSIGNED_AMZ_HEADER_ALLOWLIST.contains(&name) {
+            continue;
+        }
+        if !signed.iter().any(|signed_name| signed_name == name) {
+            warn!(
+                event = EVENT_PRESIGNED_UNSIGNED_AMZ_HEADER,
+                component = LOG_COMPONENT_AUTH,
+                subsystem = LOG_SUBSYSTEM_REQUEST,
+                reason = "unsigned_amz_header",
+                header = name,
+                "Presigned request rejected"
+            );
+            return Err(S3Error::with_message(S3ErrorCode::AccessDenied, UNSIGNED_HEADERS_MESSAGE.to_string()));
+        }
+    }
+
+    Ok(())
+}
+
 /// Parse the RustFS presigned PutObject size capability after authentication.
 ///
 /// The query value is covered by SigV4 when it is present before presigning, but
@@ -1914,6 +2011,126 @@ mod tests {
         );
     }
 
+    /// GHSA-g8w9-qw9q-fghr: `x-amz-*` request headers that are not listed in
+    /// `X-Amz-SignedHeaders` must not survive the presigned access boundary.
+    #[test]
+    fn ghsa_g8w9_presigned_request_rejects_unsigned_x_amz_headers() {
+        let presigned_host_only = "X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20260827T000000Z&X-Amz-Expires=900&X-Amz-SignedHeaders=host&X-Amz-Credential=test/20260827/us-east-1/s3/aws4_request&X-Amz-Signature=signature";
+
+        for header in [
+            "x-amz-tagging",
+            "x-amz-website-redirect-location",
+            "x-amz-storage-class",
+            "x-amz-acl",
+            "x-amz-meta-owner",
+            "x-amz-object-lock-mode",
+            "x-amz-server-side-encryption",
+        ] {
+            let mut headers = HeaderMap::new();
+            headers.insert("content-type", HeaderValue::from_static("text/plain"));
+            headers.insert(header, HeaderValue::from_static("attacker-controlled"));
+            let error = reject_unsigned_amz_headers_on_presigned_request(&headers, Some(presigned_host_only)).unwrap_err();
+            assert_eq!(error.code(), &S3ErrorCode::AccessDenied, "{header} must be rejected when unsigned");
+            assert_eq!(error.message(), Some(UNSIGNED_HEADERS_MESSAGE));
+        }
+
+        // Non-`x-amz-*` headers are outside the SigV4 rule and stay allowed.
+        let mut headers = HeaderMap::new();
+        headers.insert("content-type", HeaderValue::from_static("text/plain"));
+        headers.insert("cache-control", HeaderValue::from_static("no-store"));
+        reject_unsigned_amz_headers_on_presigned_request(&headers, Some(presigned_host_only)).unwrap();
+
+        // A missing SignedHeaders list signs nothing and still fails closed.
+        let missing_signed_headers = presigned_host_only.replace("&X-Amz-SignedHeaders=host", "");
+        let mut headers = HeaderMap::new();
+        headers.insert("x-amz-tagging", HeaderValue::from_static("a=b"));
+        assert_eq!(
+            reject_unsigned_amz_headers_on_presigned_request(&headers, Some(&missing_signed_headers))
+                .unwrap_err()
+                .code(),
+            &S3ErrorCode::AccessDenied
+        );
+
+        // Detection follows the upstream dispatch: any query carrying the
+        // signature is a presigned request, whatever the key's case.
+        let lowercase_query = presigned_host_only.to_ascii_lowercase();
+        assert_eq!(
+            reject_unsigned_amz_headers_on_presigned_request(&headers, Some(&lowercase_query))
+                .unwrap_err()
+                .code(),
+            &S3ErrorCode::AccessDenied
+        );
+
+        // Only the exact key the upstream verifier reads counts; a second
+        // (or differently cased) list must not widen the signed set, and a
+        // duplicate exact key signs nothing at all.
+        let widened_by_case = format!("{presigned_host_only}&x-amz-signedheaders=host%3Bx-amz-tagging");
+        assert_eq!(
+            reject_unsigned_amz_headers_on_presigned_request(&headers, Some(&widened_by_case))
+                .unwrap_err()
+                .code(),
+            &S3ErrorCode::AccessDenied
+        );
+        let duplicated = format!("{presigned_host_only}&X-Amz-SignedHeaders=host%3Bx-amz-tagging");
+        assert_eq!(
+            reject_unsigned_amz_headers_on_presigned_request(&headers, Some(&duplicated))
+                .unwrap_err()
+                .code(),
+            &S3ErrorCode::AccessDenied
+        );
+    }
+
+    #[test]
+    fn ghsa_g8w9_presigned_request_accepts_signed_or_exempt_x_amz_headers() {
+        let signed_tagging = "X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20260827T000000Z&X-Amz-Expires=900&X-Amz-SignedHeaders=host%3Bx-amz-tagging%3Bx-amz-meta-owner&X-Amz-Credential=test/20260827/us-east-1/s3/aws4_request&X-Amz-Signature=signature";
+
+        let mut headers = HeaderMap::new();
+        headers.insert("x-amz-tagging", HeaderValue::from_static("owner=app"));
+        headers.insert("X-Amz-Meta-Owner", HeaderValue::from_static("app"));
+        reject_unsigned_amz_headers_on_presigned_request(&headers, Some(signed_tagging)).unwrap();
+
+        // Case differences in the signed list do not matter; header names are
+        // canonicalised to lowercase on both sides.
+        let uppercase_list = signed_tagging.replace("x-amz-tagging", "X-Amz-Tagging");
+        reject_unsigned_amz_headers_on_presigned_request(&headers, Some(&uppercase_list)).unwrap();
+
+        // The CDN request id is the only unsigned `x-amz-*` header tolerated.
+        headers.insert("x-amz-cf-id", HeaderValue::from_static("cloudfront-request-id"));
+        reject_unsigned_amz_headers_on_presigned_request(&headers, Some(signed_tagging)).unwrap();
+
+        // Adding one more unsigned header on top of signed ones still fails.
+        headers.insert("x-amz-storage-class", HeaderValue::from_static("REDUCED_REDUNDANCY"));
+        assert_eq!(
+            reject_unsigned_amz_headers_on_presigned_request(&headers, Some(signed_tagging))
+                .unwrap_err()
+                .code(),
+            &S3ErrorCode::AccessDenied
+        );
+    }
+
+    #[test]
+    fn ghsa_g8w9_check_ignores_header_signed_sigv2_and_anonymous_requests() {
+        let mut headers = HeaderMap::new();
+        headers.insert("x-amz-tagging", HeaderValue::from_static("owner=app"));
+        headers.insert("x-amz-storage-class", HeaderValue::from_static("STANDARD"));
+
+        // No query at all: nothing to bind against.
+        reject_unsigned_amz_headers_on_presigned_request(&headers, None).unwrap();
+
+        // Header-signed SigV4 and SigV2 carry no `X-Amz-Signature` query.
+        headers.insert(
+            "authorization",
+            HeaderValue::from_static(
+                "AWS4-HMAC-SHA256 Credential=test/20260827/us-east-1/s3/aws4_request, SignedHeaders=host, Signature=abc",
+            ),
+        );
+        reject_unsigned_amz_headers_on_presigned_request(&headers, Some("versioning=")).unwrap();
+
+        // SigV2 presigned URLs sign every `x-amz-*` header in the string to sign.
+        let sigv2_query = "AWSAccessKeyId=test&Expires=1893456000&Signature=abc";
+        reject_unsigned_amz_headers_on_presigned_request(&headers, Some(sigv2_query)).unwrap();
+    }
+
     #[test]
     fn presigned_put_max_content_length_rejects_unsigned_or_invalid_values() {
         let headers = HeaderMap::new();

rustfs/src/storage/access.rs

@@ -20,6 +20,7 @@ use crate::auth::{
     VerifiedSigV4Request, check_key_valid_with_context, get_condition_values_with_client_info,
     get_condition_values_with_query_and_client_info, get_request_auth_type_with_query, get_session_token,
     parse_presigned_multipart_max_total_object_size, parse_presigned_put_max_content_length,
+    reject_unsigned_amz_headers_on_presigned_request,
 };
 use crate::error::ApiError;
 use crate::license::license_check;
@@ -1792,6 +1793,11 @@ fn validate_post_object_success_controls(input: &PostObjectInput) -> S3Result<()
 #[async_trait::async_trait]
 impl S3Access for FS {
     async fn check(&self, cx: &mut S3AccessContext<'_>) -> S3Result<()> {
+        // GHSA-g8w9-qw9q-fghr: a presigned URL only authorises the headers it
+        // signed. Reject unsigned `x-amz-*` headers first, before the session
+        // token lookup below or any handler reads a request header.
+        reject_unsigned_amz_headers_on_presigned_request(cx.headers(), cx.uri().query())?;
+
         // Upper layer has verified ak/sk
         // info!(
         //     "s3 check uri: {:?}, method: {:?} path: {:?}, s3_op: {:?}, cred: {:?}, headers:{:?}",
@@ -1836,11 +1842,11 @@ impl S3Access for FS {
             ..Default::default()
         };
 
-        // Publish this server's context slot so downstream data-plane handlers
-        // resolve the same store (backlog#1052 S6).
         let auth_type = get_request_auth_type_with_query(cx.headers(), cx.uri().query());
         let verified_presigned = matches!(auth_type, AuthType::Presigned);
         let verified_sigv4 = matches!(auth_type, AuthType::Presigned | AuthType::Signed);
+        // Publish this server's context slot so downstream data-plane handlers
+        // resolve the same store (backlog#1052 S6).
         {
             let ext = cx.extensions_mut();
             ext.insert(self.server_ctx().clone());