openbao releases

SECURITY

• auth/cert: Prevent token renewal with different-but-valid certificate. GHSA-7ccv-rp6m-rffr / CVE-2026-39388. [GH-2932]
• auth/token: Prevent cross-namespace token renewal, revocation by accessor. GHSA-p49j-v9wc-wg57 / CVE-2026-40264. [GH-2934]
• core: Disallow sys/generate-root/* by default due to unauthenticated cancellation; use disable_unauthed_generate_root_endpoints=false to temporarily re-enable. Upstream HCSEC-2026-08 / CVE-2026-5807. [GH-2912]
• core: Forbid request path traversal using . and .. segments by default. If required, set the unsafe_relative_paths. Upstream HCSEC-2026-05 / CVE-2026-3605. [GH-2910]
• core/plugins: Validate and restrict downloaded plugin binary size from OCI images; set plugin_download_max_size to limit the size (defaults to 512MB). GHSA-r65v-xgwc-g56j / CVE-2026-39396. [GH-2941]
• core/namespaces: Ensure lease revocation on namespace re-deletion. GHSA-vv66-6rp4-wr4f. [GH-2935]
• database/postgresql: Correctly quote schema name in revoke statement. GHSA-6vgr-cp5c-ffx3 / CVE-2026-39946. [GH-2931]

BUG FIXES

• command/server: Refuse repeated startup if self-initialization failed on initial run. [GH-2908]
• core: Fix namespace invalidation on standby when disable_cache=true is set. [GH-2822]
• core: Loosen overly strict check for view path check, strictly forbidding .. as a substring within path segments. [GH-2910]
• secret/database, secret/openldap, secret/rabbitmq: Fix dynamic secret requests failing with an "Internal Server Error" on standby nodes [GH-2853]

What's Changed

• Add note for direct install using the Arch Linux package manager (#2718) by @hashworks in https://github.com/openbao/openbao/pull/2719
• fix: some dynamic secret engines did not forward the request to the primary (#2853) by @phil9909 in https://github.com/openbao/openbao/pull/2855
• Fix namespace invalidation without caching (#2822) by @phil9909 in https://github.com/openbao/openbao/pull/2856
• Make self-init failures fatal (#2908 & #2195) by @satoqz in https://github.com/openbao/openbao/pull/2924
• v2.5.3 dependency bumps by @satoqz in https://github.com/openbao/openbao/pull/2907
• Forbid path traversal by default (#2910) by @satoqz in https://github.com/openbao/openbao/pull/2929
• Check certificate match during renewal (#2932) by @satoqz in https://github.com/openbao/openbao/pull/2937
• Correctly quote schema name in PostgreSQL revoke (#2931) by @satoqz in https://github.com/openbao/openbao/pull/2938
• Prevent cross-namespace token accessor use (#2934) by @satoqz in https://github.com/openbao/openbao/pull/2939
• Additional v2.5.3 dependency bumps by @satoqz in https://github.com/openbao/openbao/pull/2930
• Ensure lease revocation on namespace re-deletion (#2935) by @satoqz in https://github.com/openbao/openbao/pull/2943
• Validate downloaded plugin binary size (#2941) by @satoqz in https://github.com/openbao/openbao/pull/2944
• Forbid generate-root by default (#2912) by @cipherboy in https://github.com/openbao/openbao/pull/2945
• Add release notes for v2.5.3 by @satoqz in https://github.com/openbao/openbao/pull/2946

Full Changelog: https://github.com/openbao/openbao/compare/v2.5.2...v2.5.3