diff --git a/crates/kms/tests/vault_approle_live.rs b/crates/kms/tests/vault_approle_live.rs
index 441ce8107..b36434218 100644
--- a/crates/kms/tests/vault_approle_live.rs
+++ b/crates/kms/tests/vault_approle_live.rs
@@ -29,6 +29,8 @@ use rustfs_kms::{
 };
 use std::collections::HashMap;
 
+const LIVE_KEY_DESCRIPTION: &str = "AppRole live metadata";
+
 fn assert_approle_config(config: &KmsConfig, expected_backend: KmsBackend) {
     assert_eq!(config.backend, expected_backend);
     let auth_method = match &config.backend_config {
@@ -42,12 +44,13 @@ fn assert_approle_config(config: &KmsConfig, expected_backend: KmsBackend) {
     );
 }
 
-async fn exercise_backend<B: KmsBackendTrait + ?Sized>(backend: &B, key_prefix: &str) -> rustfs_kms::Result<()> {
+async fn exercise_backend<B: KmsBackendTrait + ?Sized>(backend: &B, key_prefix: &str) -> rustfs_kms::Result<String> {
     let key_id = format!("{key_prefix}-{}", uuid::Uuid::new_v4());
     let created = backend
         .create_key(CreateKeyRequest {
             key_name: Some(key_id.clone()),
             key_usage: KeyUsage::EncryptDecrypt,
+            description: Some(LIVE_KEY_DESCRIPTION.to_string()),
             ..Default::default()
         })
         .await?;
@@ -57,6 +60,7 @@ async fn exercise_backend<B: KmsBackendTrait + ?Sized>(backend: &B, key_prefix:
         .describe_key(rustfs_kms::DescribeKeyRequest { key_id: key_id.clone() })
         .await?;
     assert_eq!(described.key_metadata.key_id, key_id);
+    assert_eq!(described.key_metadata.description.as_deref(), Some(LIVE_KEY_DESCRIPTION));
 
     let listed = backend
         .list_keys(ListKeysRequest {
@@ -88,7 +92,7 @@ async fn exercise_backend<B: KmsBackendTrait + ?Sized>(backend: &B, key_prefix:
         })
         .await?;
     assert_eq!(unwrapped.plaintext, generated.plaintext_key);
-    Ok(())
+    Ok(key_id)
 }
 
 #[tokio::test]
@@ -97,7 +101,7 @@ async fn vault_kv2_approle_auth_live() -> rustfs_kms::Result<()> {
     let config = KmsConfig::from_env()?;
     assert_approle_config(&config, KmsBackend::VaultKv2);
     let backend = VaultKmsBackend::new(config).await?;
-    exercise_backend(&backend, "rustfs-approle-kv2").await
+    exercise_backend(&backend, "rustfs-approle-kv2").await.map(|_| ())
 }
 
 #[tokio::test]
@@ -109,9 +113,34 @@ async fn vault_transit_approle_auth_live() -> rustfs_kms::Result<()> {
         BackendConfig::VaultTransit(vault) => vault,
         _ => panic!("expected Vault Transit configuration"),
     };
+    assert_eq!(transit.mount_path, "transit");
     assert_eq!(transit.metadata_kv_mount, DEFAULT_VAULT_TRANSIT_METADATA_KV_MOUNT);
     assert_eq!(transit.metadata_key_prefix, DEFAULT_VAULT_TRANSIT_METADATA_KEY_PREFIX);
 
     let backend = VaultTransitKmsBackend::new(config).await?;
-    exercise_backend(&backend, "rustfs-approle-transit").await
+    exercise_backend(&backend, "rustfs-approle-transit").await.map(|_| ())
+}
+
+#[tokio::test]
+#[ignore = "requires a real Vault AppRole; run scripts/test/vault_approle_kms_live.sh"]
+async fn vault_transit_approle_custom_paths_live() -> rustfs_kms::Result<()> {
+    let config = KmsConfig::from_env()?;
+    assert_approle_config(&config, KmsBackend::VaultTransit);
+    let BackendConfig::VaultTransit(transit) = &config.backend_config else {
+        panic!("expected Vault Transit configuration");
+    };
+    assert_eq!(transit.mount_path, "kms-test/transit");
+    assert_eq!(transit.metadata_kv_mount, "kms-test/metadata");
+    assert_eq!(transit.metadata_key_prefix, "custom/transit-metadata");
+
+    let backend = VaultTransitKmsBackend::new(config.clone()).await?;
+    let key_id = exercise_backend(&backend, "rustfs-approle-custom-transit").await?;
+    drop(backend);
+
+    // A fresh backend must read the stored record, not synthesize Enabled
+    // metadata or reuse a record cached during key creation.
+    let restarted = VaultTransitKmsBackend::new(config).await?;
+    let described = restarted.describe_key(rustfs_kms::DescribeKeyRequest { key_id }).await?;
+    assert_eq!(described.key_metadata.description.as_deref(), Some(LIVE_KEY_DESCRIPTION));
+    Ok(())
 }
diff --git a/scripts/test/vault_approle_kms_live.sh b/scripts/test/vault_approle_kms_live.sh
index 398daffd4..ada1f0e2f 100755
--- a/scripts/test/vault_approle_kms_live.sh
+++ b/scripts/test/vault_approle_kms_live.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-# Start an ephemeral Vault, issue a least-privilege AppRole, and run the two
+# Start an ephemeral Vault, issue a least-privilege AppRole, and run the
 # ignored RustFS KMS checks without ever exposing the generated credentials.
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -77,6 +77,8 @@ if [[ "$ready" != 1 ]]; then
 fi
 
 vault_cli secrets enable -path=transit transit >/dev/null
+vault_cli secrets enable -path=kms-test/transit transit >/dev/null
+vault_cli secrets enable -path=kms-test/metadata kv-v2 >/dev/null
 vault_cli auth enable approle >/dev/null
 
 POLICY_NAME="rustfs-kms-live-$$"
@@ -105,6 +107,11 @@ path "secret/metadata/rustfs/kms/transit-metadata" {
   capabilities = ["list"]
 }
 
+# Non-default Transit metadata mount and prefix, both containing slashes.
+path "kms-test/metadata/data/custom/transit-metadata/*" {
+  capabilities = ["create", "read", "update"]
+}
+
 # Transit key lifecycle and data-path operations.
 path "transit/keys" {
   capabilities = ["list"]
@@ -118,6 +125,20 @@ path "transit/encrypt/*" {
 path "transit/decrypt/*" {
   capabilities = ["update"]
 }
+
+# The same operations under a non-default, nested Transit mount.
+path "kms-test/transit/keys" {
+  capabilities = ["list"]
+}
+path "kms-test/transit/keys/*" {
+  capabilities = ["create", "read", "update"]
+}
+path "kms-test/transit/encrypt/*" {
+  capabilities = ["update"]
+}
+path "kms-test/transit/decrypt/*" {
+  capabilities = ["update"]
+}
 EOF
 
 vault_cli policy write "$POLICY_NAME" "$POLICY_FILE" >/dev/null
@@ -135,6 +156,9 @@ SECRET_ID="$(vault_cli write -f -field=secret_id "auth/approle/role/${ROLE_NAME}
 run_live_test() {
   local backend="$1"
   local test_name="$2"
+  local transit_mount="${3:-transit}"
+  local metadata_mount="${4:-secret}"
+  local metadata_prefix="${5:-rustfs/kms/transit-metadata}"
 
   local -a backend_env=(
     -u RUSTFS_KMS_BACKEND
@@ -178,9 +202,9 @@ run_live_test() {
     )
   else
     backend_env+=(
-      RUSTFS_KMS_VAULT_MOUNT_PATH=transit
-      RUSTFS_KMS_VAULT_TRANSIT_METADATA_KV_MOUNT=secret
-      RUSTFS_KMS_VAULT_TRANSIT_METADATA_PREFIX=rustfs/kms/transit-metadata
+      RUSTFS_KMS_VAULT_MOUNT_PATH="$transit_mount"
+      RUSTFS_KMS_VAULT_TRANSIT_METADATA_KV_MOUNT="$metadata_mount"
+      RUSTFS_KMS_VAULT_TRANSIT_METADATA_PREFIX="$metadata_prefix"
     )
   fi
 
@@ -193,4 +217,9 @@ run_live_test() {
 cd "$PROJECT_ROOT"
 run_live_test vault vault_kv2_approle_auth_live
 run_live_test vault-transit vault_transit_approle_auth_live
+# Remove the default mounts so a fallback to transit or secret cannot pass.
+vault_cli secrets disable transit >/dev/null
+vault_cli secrets disable secret >/dev/null
+run_live_test vault-transit vault_transit_approle_custom_paths_live \
+  kms-test/transit kms-test/metadata custom/transit-metadata
 echo "Vault AppRole KV2 and Transit live checks passed"