Rack is a modular Ruby web server interface. Carefully crafted content type headers can cause Rack’s media type parser to take much longer than expected, leading to a possible denial of service vulnerability (ReDos 2nd degree polynomial). This vulnerability is patched in 3.0.9.1 and 2.2.8.1.
https://security.netapp.com/advisory/ntap-20240510-0005/
https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-25126.yml
https://github.com/rack/rack/security/advisories/GHSA-22f2-v57c-j9cx
https://github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49
https://github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462
https://discuss.rubyonrails.org/t/denial-of-service-vulnerability-in-rack-content-type-parsing/84941