CVE-2025-27111
Description
Rack is a modular Ruby web server interface. The Rack::Sendfile middleware logs unsanitised header values from the X-Sendfile-Type header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection. This vulnerability is fixed in 2.2.12, 3.0.13, and 3.1.11.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 3.1.12-1 |
| sid | Fixed | 3.1.12-1 |
| forky | Fixed | 3.1.12-1 |
| bullseye | Fixed | 2.1.4-3+deb11u3 |
| bookworm | Fixed | 2.2.13-1~deb12u1 |
References
- https://github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v
- https://www.suse.com/security/cve/CVE-2025-27111.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-27111
- https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53
- https://github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b
- https://github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3
- https://github.com/rack/rack
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27111.yml
- https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html
- https://security-tracker.debian.org/tracker/CVE-2025-27111
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.