| Name | CVE-2025-59830 |
| Description | Rack is a modular Ruby web server interface. Prior to version 2.2.18, Rack::QueryParser enforces its params_limit only for parameters separated by &, while still splitting on both & and ;. As a result, attackers could use ; separators to bypass the parameter count limit and submit more parameters than intended. Applications or middleware that directly invoke Rack::QueryParser with its default configuration (no explicit delimiter) could be exposed to increased CPU and memory consumption. This can be abused as a limited denial-of-service vector. This issue has been patched in version 2.2.18. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1116431 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ruby-rack (PTS) | bullseye | 2.1.4-3+deb11u2 | vulnerable |
| bullseye (security) | 2.1.4-3+deb11u3 | vulnerable |
| bookworm, bookworm (security) | 2.2.13-1~deb12u1 | vulnerable |
| forky, sid, trixie | 3.1.16-0.1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| ruby-rack | source | (unstable) | (unfixed) | | | 1116431 |
Notes
https://github.com/rack/rack/security/advisories/GHSA-625h-95r8-8xpm
Fixed by: https://github.com/rack/rack/commit/54e4ffdd5affebcb0c015cc6ae74635c0831ed71 (v2.2.18)
check, might be fixed in upper versions due to refactoring, e.g. f904fff079c7 ("Add `Rack::Request#form_pairs` (#2351)") in v3.2.0