diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 50ddfeaa4f..6898b1b59a 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.26.9@sha256:d7722066f0b60ceccb6c0643cbed1f5f9e15506ac237146c95333504d7805d89
+FROM golang:1.26.10@sha256:3745f1aa11822297b79113f5e84ce2bffeb039734571c39855809cfe9e5d7be6
 
 # Set bash as default shell for features
 SHELL ["/bin/bash", "-c"]
diff --git a/.devcontainer/README.md b/.devcontainer/README.md
index 6649aae036..f846e1bea5 100644
--- a/.devcontainer/README.md
+++ b/.devcontainer/README.md
@@ -5,7 +5,7 @@ This dev container provides a complete, reproducible development environment for
 ## What's Included
 
 ### Development Tools
-- **Go 1.26.9** - Backend development
+- **Go 1.26.10** - Backend development
 - **Node.js 24** - Frontend development
 - **gopls v0.17.0** - Go language server
 - **Delve** - Go debugger
@@ -225,7 +225,7 @@ Custom overrides: Create `.env.devcontainer` (gitignored)
 ## Resources
 
 - **VM Specs**: 8GB RAM, 30GB disk, 2 CPU cores
-- **Base Image**: `golang:1.26.9` (Debian-based)
+- **Base Image**: `golang:1.26.10` (Debian-based)
 - **Caches**: ~2-3GB for Go modules and build artifacts
 
 ## Tips & Tricks
@@ -247,7 +247,7 @@ MacBook (VS Code)
 dev-containers VM (Proxmox)
     ↓ Docker
 Dev Container
-    ├── Go 1.26.9 + tools
+    ├── Go 1.26.10 + tools
     ├── Node 24 + npm
     ├── Your code (/workspaces/pulse)
     ├── Hot reload watchers
diff --git a/.github/workflows/root-pair-diagnostic.yml b/.github/workflows/root-pair-diagnostic.yml
index 1ed5af6347..4d47992f23 100644
--- a/.github/workflows/root-pair-diagnostic.yml
+++ b/.github/workflows/root-pair-diagnostic.yml
@@ -35,7 +35,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
-          go-version: '1.26.9'
+          go-version: '1.26.10'
           cache: false
       - name: Collect fixed exact-pair root evidence
         run: python3 scripts/diagnose-root-pair.py --output root-pair-evidence
diff --git a/Dockerfile b/Dockerfile
index 1e4e2b40a8..ac1288f80f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,7 +26,7 @@ RUN --mount=type=cache,id=pulse-npm-cache,target=/root/.npm \
 # Build stage for Go backend
 # Force amd64 platform - Go cross-compiles for all targets anyway,
 # and this avoids slow QEMU emulation during multi-arch builds
-FROM --platform=linux/amd64 golang:1.26.9-alpine@sha256:3082400e369fa24d5fc60bca20edab3f6d604e0c5a690ec66b295eff4dd87ade AS backend-builder
+FROM --platform=linux/amd64 golang:1.26.10-alpine@sha256:9ce231b28998b32e116927c61aa5c406183061d4f3f2d61b292c88e7f6bdf7ca AS backend-builder
 
 ARG BUILD_AGENT
 ARG VERSION
diff --git a/deploy/provider-msp/Dockerfile.control-plane b/deploy/provider-msp/Dockerfile.control-plane
index f2f65fc6d9..48afaacce0 100644
--- a/deploy/provider-msp/Dockerfile.control-plane
+++ b/deploy/provider-msp/Dockerfile.control-plane
@@ -12,7 +12,7 @@ COPY SECURITY.md TERMS.md /app/
 RUN --mount=type=cache,id=pulse-control-plane-npm-cache,target=/root/.npm \
     npm run build
 
-FROM --platform=$BUILDPLATFORM golang:1.26.9-alpine@sha256:3082400e369fa24d5fc60bca20edab3f6d604e0c5a690ec66b295eff4dd87ade AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.10-alpine@sha256:9ce231b28998b32e116927c61aa5c406183061d4f3f2d61b292c88e7f6bdf7ca AS builder
 ARG VERSION=dev
 ARG BUILD_TIME=unknown
 ARG GIT_COMMIT=unknown
diff --git a/docs/operations/root-pair-diagnostic.md b/docs/operations/root-pair-diagnostic.md
index 944f067634..b58c92b0b2 100644
--- a/docs/operations/root-pair-diagnostic.md
+++ b/docs/operations/root-pair-diagnostic.md
@@ -10,7 +10,7 @@ The source pair is fixed in `scripts/diagnose-root-pair.py`: baseline
 `1120cce4d631bca5525cafc5b5620251998773f7` tree measured from ephemeral
 source commit `4cdf250f474ad9cde6ffb121527f021b7387603f7`; metadata retains that original
 evidence identity. Tree and HTTP source hashes must match. Both API test binaries
-use Go 1.26.9, readonly modules and identical CI
+use Go 1.26.10, readonly modules and identical CI
 embed text; compilation finishes before either warm-up. Four available CPUs
 are selected and inherited by children, GOMAXPROCS is four. After two 100ms
 warm-ups and ten seconds settling, ten rounds alternate AB/BA with one 1s
diff --git a/docs/release-control/v6/internal/subsystems/deployment-installability.md b/docs/release-control/v6/internal/subsystems/deployment-installability.md
index 8e64ee04e5..e25c06f16c 100644
--- a/docs/release-control/v6/internal/subsystems/deployment-installability.md
+++ b/docs/release-control/v6/internal/subsystems/deployment-installability.md
@@ -5176,8 +5176,8 @@ governed release toolchain and immutable Go builder digest together, not to
 suppress the scanner or produce release artifacts with an older patched-over
 runtime.
 The hosted control-plane source builder and integration mock builder are both
-on the reviewed `golang:1.26.9-alpine` digest
-`sha256:3082400e369fa24d5fc60bca20edab3f6d604e0c5a690ec66b295eff4dd87ade`.
+on the reviewed `golang:1.26.10-alpine` digest
+`sha256:9ce231b28998b32e116927c61aa5c406183061d4f3f2d61b292c88e7f6bdf7ca`.
 `TestProviderMSPGoBuilderMatchesIntegrationMock` pins their exact agreement;
 it does not pull the image, prove its registry contents, or qualify a deployed
 control plane. The release publisher's prebuilt control-plane target is a
@@ -5233,14 +5233,19 @@ generated row-level inventory that does prove completeness, needs a declarative
 record in the preparation snapshot: a marker in the body alone could be deleted to restore
 legacy acceptance, and a frozen in-flight release keeps its own renderer.
 
-As of 2026-10-11, the governed release floor is Go `1.26.9`. It supersedes
-`1.26.8`, whose standard library is reachable through twelve vulnerable Pulse
-call paths reported by `govulncheck` after the 2026-10-08 advisories, including
-`net/http`, `crypto/tls`, `html/template`, `os`, and `net/textproto`. The
+As of 2026-10-21, the governed release floor is Go `1.26.10`. It supersedes
+`1.26.9`, whose `crypto/x509` still verifies chains through the compromised
+eMudhra intermediate CAs that Go 1.26.10 distrusts (CVE-2026-111943, Go issue
+82345). Pulse's certificate-verifying outbound TLS clients, such as licence,
+update, webhook and AI-provider connections, verify chains with that package, so
+an older compiler leaves an interception path open even though `govulncheck`
+need not report a called symbol for a trust-store change. The 2026-10-11 floor
+of `1.26.9` remains the minimum for the 2026-10-08 `net/http`, `crypto/tls`,
+`html/template`, `os`, and `net/textproto` advisories, and the
 `golang.org/x/net` floor is `v0.60.0` for the same advisories. Source-built
 container stages pin the Docker Official Images manifest list for
-`golang:1.26.9-alpine`,
-`sha256:3082400e369fa24d5fc60bca20edab3f6d604e0c5a690ec66b295eff4dd87ade`;
+`golang:1.26.10-alpine`,
+`sha256:9ce231b28998b32e116927c61aa5c406183061d4f3f2d61b292c88e7f6bdf7ca`;
 the checked-in toolchain files and release-script guards must reject an older
 compiler so local, exact-candidate, provider control-plane, and container builds
 cannot silently reintroduce the vulnerable runtime.
@@ -5255,6 +5260,12 @@ copies; a successful production build alone does not establish this property.
 Vitest migration must preserve test assertions while using constructable
 constructor mocks and explicit standalone mock-history cleanup. Dependency
 updates must retain the required full-graph audit rather than suppressing it.
+The same boundary keeps Vite on 6.x at or above `6.4.5`: 6.4.4 bundles the
+patched `launch-editor` (GHSA-587h-7wmj-h5pm, GHSA-r825-w8mm-5pxw,
+GHSA-698v-4r3x-3vcv) and 6.4.5 applies the dev-server `server.fs` check after
+stripping the query. These reach only the local dev server, never the built
+product, and the same proof file pins the manifest range and the single locked
+copy.
 
 The October deserialization/parsing advisory floors are Seroval `1.6.3`
 (GHSA-p6vx-979v-rg4c and GHSA-jp82-f5mq-hwhp), postcss-selector-parser `7.1.6`
diff --git a/frontend-modern/package-lock.json b/frontend-modern/package-lock.json
index f6e1bb385a..6f0ebc9838 100644
--- a/frontend-modern/package-lock.json
+++ b/frontend-modern/package-lock.json
@@ -38,7 +38,7 @@
         "tailwindcss": "^4.3.3",
         "typescript": "^5.3.0",
         "typescript-eslint": "^8.71.1",
-        "vite": "^6.4.3",
+        "vite": "^6.4.5",
         "vite-plugin-solid": "^2.11.14",
         "vite-plugin-sri-gen": "^1.7.4",
         "vitest": "^4.1.11"
@@ -5764,9 +5764,9 @@
       "license": "MIT"
     },
     "node_modules/vite": {
-      "version": "6.4.3",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.3.tgz",
-      "integrity": "sha512-NTKlcQjlAK7MlQoyb6LgaqHc8sso/pVyUJYWMws3jg21uTJw/LddqIFPcPqP6PzpgbIcZyKI85sFE4HBrQDA8A==",
+      "version": "6.4.5",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.5.tgz",
+      "integrity": "sha512-4enwjFfi4IwtEh0w+jPzpLVOFQiPHmmzPxcHXQOyEur47o6u0jE573DmGpjA+7irXoMLYRZD5ZaFUEneS3abPg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/frontend-modern/package.json b/frontend-modern/package.json
index b207d4623f..1b5b9f211a 100644
--- a/frontend-modern/package.json
+++ b/frontend-modern/package.json
@@ -91,7 +91,7 @@
     "tailwindcss": "^4.3.3",
     "typescript": "^5.3.0",
     "typescript-eslint": "^8.71.1",
-    "vite": "^6.4.3",
+    "vite": "^6.4.5",
     "vite-plugin-solid": "^2.11.14",
     "vite-plugin-sri-gen": "^1.7.4",
     "vitest": "^4.1.11"
diff --git a/frontend-modern/src/security/__tests__/dependencySecurity.test.ts b/frontend-modern/src/security/__tests__/dependencySecurity.test.ts
index 389ebc1a29..365067cb47 100644
--- a/frontend-modern/src/security/__tests__/dependencySecurity.test.ts
+++ b/frontend-modern/src/security/__tests__/dependencySecurity.test.ts
@@ -125,6 +125,18 @@ describe('frontend dependency security floors', () => {
     }
   });
 
+  it('keeps Vite above the bundled launch-editor and dev-server fs floors', () => {
+    // GHSA-587h-7wmj-h5pm, GHSA-r825-w8mm-5pxw and GHSA-698v-4r3x-3vcv: Vite
+    // bundles launch-editor, fixed on 6.x in 6.4.4. 6.4.5 also applies the
+    // server.fs check after stripping the query.
+    expect(manifest.devDependencies.vite).toBe('^6.4.5');
+    const versions = lockedVersions('vite');
+    expect(versions).toHaveLength(1);
+    expect(versions[0]).not.toContain('-');
+    expect(parseVersion(versions[0])[0], 'vite must stay on the reviewed major').toBe(6);
+    expect(atLeast(versions[0], [6, 4, 5]), `vite ${versions[0]} is vulnerable`).toBe(true);
+  });
+
   it('keeps every js-yaml copy above the empty-merge CPU exhaustion floor', () => {
     // GHSA-2883-xcg3-v3hh: our override keeps every transitive copy on patched 4.x.
     expect(manifest.overrides['js-yaml']).toBe('^4.3.2');
diff --git a/go.mod b/go.mod
index a8953338a4..54d1973c6a 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/rcourtman/pulse-go-rewrite
 
 go 1.26.0
 
-toolchain go1.26.9
+toolchain go1.26.10
 
 require (
 	github.com/IGLOU-EU/go-wildcard/v2 v2.1.1
diff --git a/scripts/.go-version b/scripts/.go-version
index cf88115cf1..7aa12eed51 100644
--- a/scripts/.go-version
+++ b/scripts/.go-version
@@ -1 +1 @@
-go1.26.9
+go1.26.10
diff --git a/scripts/build-release-binaries.sh b/scripts/build-release-binaries.sh
index 2b1fb23eb0..456d7b17cf 100755
--- a/scripts/build-release-binaries.sh
+++ b/scripts/build-release-binaries.sh
@@ -44,7 +44,7 @@ case "${OUTPUT_ROOT}" in
         ;;
 esac
 
-required_go="go1.26.9"
+required_go="go1.26.10"
 current_go="$(go env GOVERSION 2>/dev/null || true)"
 if [[ "${current_go}" != "${required_go}" ]]; then
     echo "Error: Go toolchain must be ${required_go} (got ${current_go:-unknown})." >&2
diff --git a/scripts/build-release.sh b/scripts/build-release.sh
index 3735e83f79..31ef661e44 100755
--- a/scripts/build-release.sh
+++ b/scripts/build-release.sh
@@ -20,7 +20,7 @@ if [ -x /usr/local/go/bin/go ]; then
 fi
 
 # Release artifacts must be built with the vetted toolchain to match security-gate evidence.
-required_go="go1.26.9"
+required_go="go1.26.10"
 current_go="$(go env GOVERSION 2>/dev/null || true)"
 if [[ "${PULSE_SKIP_GO_VERSION_CHECK:-false}" != "true" ]]; then
     if [[ "${current_go}" != "${required_go}" ]]; then
diff --git a/scripts/build-secure-runtime-qualification.sh b/scripts/build-secure-runtime-qualification.sh
index 58b9d80fc7..8b186e4701 100755
--- a/scripts/build-secure-runtime-qualification.sh
+++ b/scripts/build-secure-runtime-qualification.sh
@@ -35,7 +35,7 @@ if [[ -z "${PULSE_UPDATE_SIGNING_PUBLIC_KEY:-}" ]]; then
     exit 3
 fi
 
-required_go="go1.26.9"
+required_go="go1.26.10"
 go_version="$(go env GOVERSION 2>/dev/null || true)"
 if [[ "${go_version}" != "${required_go}" ]]; then
     echo "Error: Go toolchain must be ${required_go} (got ${go_version:-unknown})." >&2
diff --git a/scripts/diagnose-root-pair.py b/scripts/diagnose-root-pair.py
index fefc59989f..f3f1c9ddb3 100644
--- a/scripts/diagnose-root-pair.py
+++ b/scripts/diagnose-root-pair.py
@@ -71,8 +71,8 @@ def telemetry():
 def execute(repo, output):
     output.mkdir(parents=True, exist_ok=False)  # never overwrite a previous attempt
     os.environ.update(GOTOOLCHAIN='local', GOMAXPROCS='4', GOFLAGS='-mod=readonly', GOENV='off', GOAMD64='v1', CGO_ENABLED='1')
-    if run(['go', 'version']).strip() != 'go version go1.26.9 linux/amd64':
-        raise ValueError('requires exact hosted experiment toolchain go1.26.9 linux/amd64')
+    if run(['go', 'version']).strip() != 'go version go1.26.10 linux/amd64':
+        raise ValueError('requires exact hosted experiment toolchain go1.26.10 linux/amd64')
     metadata = {
         'purpose': 'diagnostic-only; no gate disposition or release candidate',
         'rounds': ROUNDS, 'gomaxprocs': 4, 'benchtime': '1s',
diff --git a/scripts/install-go-toolchain.sh b/scripts/install-go-toolchain.sh
index ddbbc9fb90..d3219fa183 100755
--- a/scripts/install-go-toolchain.sh
+++ b/scripts/install-go-toolchain.sh
@@ -3,7 +3,7 @@ set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 VERSION_FILE="${SCRIPT_DIR}/.go-version"
-DEFAULT_VERSION="go1.26.9"
+DEFAULT_VERSION="go1.26.10"
 TARGET_ROOT="/opt/toolchains/go"
 DOWNLOAD_ROOT="https://dl.google.com/go"
 GOPATH_DIR="/var/lib/pulse/go"
diff --git a/scripts/installtests/build_release_assets_test.go b/scripts/installtests/build_release_assets_test.go
index e566f5de83..1646cd2463 100644
--- a/scripts/installtests/build_release_assets_test.go
+++ b/scripts/installtests/build_release_assets_test.go
@@ -1629,7 +1629,7 @@ func TestDockerBuildUsesCanonicalReleaseLdflags(t *testing.T) {
 	dockerfile := string(dockerfileBytes)
 	dockerRequired := []string{
 		"FROM --platform=linux/amd64 node:24-alpine@sha256:" + node24Amd64FrontendDigest + " AS frontend-builder",
-		`FROM --platform=linux/amd64 golang:1.26.9-alpine@sha256:`,
+		`FROM --platform=linux/amd64 golang:1.26.10-alpine@sha256:`,
 		`FROM backend-builder AS release-assets-builder`,
 		`AS agent_runtime`,
 		`AS pulse-runtime-foundation`,
@@ -1664,7 +1664,7 @@ func TestDockerBuildUsesCanonicalReleaseLdflags(t *testing.T) {
 		}
 	}
 	assertDigestPinnedDockerStage(t, dockerfile, `FROM --platform=linux/amd64 node:24-alpine@sha256:`, ` AS frontend-builder`)
-	assertDigestPinnedDockerStage(t, dockerfile, `FROM --platform=linux/amd64 golang:1.26.9-alpine@sha256:`, ` AS backend-builder`)
+	assertDigestPinnedDockerStage(t, dockerfile, `FROM --platform=linux/amd64 golang:1.26.10-alpine@sha256:`, ` AS backend-builder`)
 	assertDigestPinnedDockerStage(t, dockerfile, `FROM alpine:3.24@sha256:`, ` AS agent_runtime`)
 	assertDigestPinnedDockerStage(t, dockerfile, `FROM alpine:3.24@sha256:`, ` AS pulse-runtime-foundation`)
 	hostedStart := strings.Index(dockerfile, `FROM pulse-runtime-base AS hosted_runtime`)
@@ -1677,7 +1677,7 @@ func TestDockerBuildUsesCanonicalReleaseLdflags(t *testing.T) {
 		t.Fatalf("hosted_runtime target must not depend on installer rendering or embedded agent artifacts:\n%s", hostedStage)
 	}
 	if strings.Contains(dockerfile, `FROM --platform=linux/amd64 node:24-alpine AS frontend-builder`) ||
-		strings.Contains(dockerfile, `FROM --platform=linux/amd64 golang:1.26.9-alpine AS backend-builder`) ||
+		strings.Contains(dockerfile, `FROM --platform=linux/amd64 golang:1.26.10-alpine AS backend-builder`) ||
 		strings.Contains(dockerfile, `FROM alpine:3.24 AS agent_runtime`) ||
 		strings.Contains(dockerfile, `FROM alpine:3.24 AS pulse-runtime-base`) {
 		t.Fatal("Dockerfile base images must be pinned by immutable @sha256 digests")
diff --git a/scripts/installtests/integration_container_test.go b/scripts/installtests/integration_container_test.go
index 437ec9be88..59f196d635 100644
--- a/scripts/installtests/integration_container_test.go
+++ b/scripts/installtests/integration_container_test.go
@@ -13,7 +13,7 @@ func TestIntegrationContainersUseGovernedImmutableBases(t *testing.T) {
 		t.Fatalf("read mock GitHub Dockerfile: %v", err)
 	}
 	dockerfile := string(dockerfileBytes)
-	assertDigestPinnedDockerStage(t, dockerfile, `FROM golang:1.26.9-alpine@sha256:`, ` AS builder`)
+	assertDigestPinnedDockerStage(t, dockerfile, `FROM golang:1.26.10-alpine@sha256:`, ` AS builder`)
 	assertDigestPinnedDockerStage(t, dockerfile, `FROM alpine:3.24@sha256:`, ``)
 
 	composeBytes, err := os.ReadFile(repoFile("tests", "integration", "docker-compose.test.yml"))
diff --git a/scripts/installtests/provider_msp_deploy_test.go b/scripts/installtests/provider_msp_deploy_test.go
index c38f00501c..bb0f9ffaab 100644
--- a/scripts/installtests/provider_msp_deploy_test.go
+++ b/scripts/installtests/provider_msp_deploy_test.go
@@ -15,7 +15,7 @@ func TestProviderMSPGoBuilderMatchesIntegrationMock(t *testing.T) {
 	// These builders use the same Go patch level and immutable image. The
 	// mock's build must not exercise a different compiler from the hosted
 	// control plane merely because Dependabot advanced one Dockerfile.
-	const expected = "golang:1.26.9-alpine@sha256:3082400e369fa24d5fc60bca20edab3f6d604e0c5a690ec66b295eff4dd87ade"
+	const expected = "golang:1.26.10-alpine@sha256:9ce231b28998b32e116927c61aa5c406183061d4f3f2d61b292c88e7f6bdf7ca"
 	pattern := regexp.MustCompile(`(?m)^FROM (?:--platform=\$BUILDPLATFORM )?(golang:[^[:space:]]+) AS builder$`)
 	for _, path := range [][]string{
 		{"deploy", "provider-msp", "Dockerfile.control-plane"},
@@ -328,7 +328,7 @@ func TestProviderMSPControlPlaneDockerfileBuildsReleaseLicenseBinary(t *testing.
 		"FROM --platform=linux/amd64 node:24-alpine@sha256:"+node24Amd64FrontendDigest+" AS frontend-builder",
 		"npm ci",
 		"npm run build",
-		"FROM --platform=$BUILDPLATFORM golang:1.26.9-alpine@sha256:",
+		"FROM --platform=$BUILDPLATFORM golang:1.26.10-alpine@sha256:",
 		"FROM alpine:3.24@sha256:",
 		"ARG PULSE_LICENSE_PUBLIC_KEY_SHA256",
 		"ARG TARGETOS",
@@ -355,7 +355,7 @@ func TestProviderMSPControlPlaneDockerfileBuildsReleaseLicenseBinary(t *testing.
 		"CGO_ENABLED=0 go build -o /pulse-control-plane ./cmd/pulse-control-plane",
 	)
 	assertDigestPinnedDockerStage(t, text, `FROM --platform=linux/amd64 node:24-alpine@sha256:`, ` AS frontend-builder`)
-	assertDigestPinnedDockerStage(t, text, `FROM --platform=$BUILDPLATFORM golang:1.26.9-alpine@sha256:`, ` AS builder`)
+	assertDigestPinnedDockerStage(t, text, `FROM --platform=$BUILDPLATFORM golang:1.26.10-alpine@sha256:`, ` AS builder`)
 	assertDigestPinnedDockerStage(t, text, `FROM alpine:3.24@sha256:`, ` AS control-plane-runtime-foundation`)
 }
 
diff --git a/scripts/tests/test-hot-dev-runtime.sh b/scripts/tests/test-hot-dev-runtime.sh
index 5c1c15995a..028566e6a2 100755
--- a/scripts/tests/test-hot-dev-runtime.sh
+++ b/scripts/tests/test-hot-dev-runtime.sh
@@ -414,9 +414,9 @@ test_go_release_toolchain_floor() {
   module_toolchain="$(sed -n 's/^toolchain //p' "${ROOT_DIR}/go.mod")"
   installed_toolchain="$(cd "${ROOT_DIR}" && go env GOVERSION)"
 
-  assert_contains "Go module uses the patched release toolchain" "${module_toolchain}" "go1.26.9"
-  assert_contains "dev toolchain installer uses the patched release toolchain" "$(<"${ROOT_DIR}/scripts/.go-version")" "go1.26.9"
-  assert_contains "active dev runtime resolves the patched release toolchain" "${installed_toolchain}" "go1.26.9"
+  assert_contains "Go module uses the patched release toolchain" "${module_toolchain}" "go1.26.10"
+  assert_contains "dev toolchain installer uses the patched release toolchain" "$(<"${ROOT_DIR}/scripts/.go-version")" "go1.26.10"
+  assert_contains "active dev runtime resolves the patched release toolchain" "${installed_toolchain}" "go1.26.10"
 }
 
 test_backend_race_suite_keeps_hosted_runner_timeout_headroom() {
diff --git a/scripts/tests/test_root_pair_diagnostic.py b/scripts/tests/test_root_pair_diagnostic.py
index fd3434f585..0d9dc1e3ac 100644
--- a/scripts/tests/test_root_pair_diagnostic.py
+++ b/scripts/tests/test_root_pair_diagnostic.py
@@ -56,7 +56,7 @@ class DiagnosticTests(unittest.TestCase):
 
         def fake_run(args, cwd=None):
             if args == ['go', 'version']:
-                return 'go version go1.26.7 linux/amd64' if bad_go else 'go version go1.26.9 linux/amd64'
+                return 'go version go1.26.7 linux/amd64' if bad_go else 'go version go1.26.10 linux/amd64'
             if args[:2] == ['git', 'rev-parse']:
                 return 'wrong' if bad_tree else diag.TREES[args[2].split('^')[0]]
             if args[:3] == ['go', 'tool', 'nm']:
@@ -151,7 +151,7 @@ class DiagnosticTests(unittest.TestCase):
         self.assertIn('[[ "$GITHUB_RUN_ATTEMPT" == 1 ]]', workflow)
         self.assertIn('path: root-pair-evidence/', workflow)
         self.assertIn('if: always()', workflow)
-        self.assertIn("go-version: '1.26.9'", workflow)
+        self.assertIn("go-version: '1.26.10'", workflow)
         self.assertIn('timeout-minutes: 45', workflow)
 
 
diff --git a/tests/integration/mock-github-server/Dockerfile b/tests/integration/mock-github-server/Dockerfile
index 3706d55115..6e64773861 100644
--- a/tests/integration/mock-github-server/Dockerfile
+++ b/tests/integration/mock-github-server/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.26.9-alpine@sha256:3082400e369fa24d5fc60bca20edab3f6d604e0c5a690ec66b295eff4dd87ade AS builder
+FROM golang:1.26.10-alpine@sha256:9ce231b28998b32e116927c61aa5c406183061d4f3f2d61b292c88e7f6bdf7ca AS builder
 
 WORKDIR /build
 COPY go.mod ./