Resource Exhaustion The advisory has been revoked - it doesn't affect any version of package gitlab-rails-ce-18.5  (opens in a new tab)

The Chainguard security team deemed this advisory irrelevant for Chainguard:latest.

Note: Versions mentioned in the description apply only to the upstream gitlab-rails-ce-18.5 package and not the gitlab-rails-ce-18.5 package as distributed by Chainguard.

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.

• https://github.com/rack/rack/commit/589127f4ac8b5cf11cf88fb0cd116ffed4d2181e
• https://github.com/rack/rack/commit/d869fed663b113b95a74ad53e1b5cae6ab31f29e
• https://github.com/rack/rack/commit/e08f78c656c9394d6737c022bde087e0f33336fd
• https://github.com/rack/rack/security/advisories/GHSA-p543-xpfm-54cp