CVE-2025-27610
Description
Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.13, 3.0.14, and 3.1.12, `Rack::Static` can serve files under the specified `root:` even if `urls:` are provided, which may expose other files under the specified `root:` unexpectedly. The vulnerability occurs because `Rack::Static` does not properly sanitize user-supplied paths before serving files. Specifically, encoded path traversal sequences are not correctly validated, allowing attackers to access files outside the designated static file directory. By exploiting this vulnerability, an attacker can gain access to all files under the specified `root:` directory, provided they are able to determine then path of the file. Versions 2.2.13, 3.0.14, and 3.1.12 contain a patch for the issue. Other mitigations include removing usage of `Rack::Static`, or ensuring that `root:` points at a directory path which only contains files which should be accessed publicly. It is likely that a CDN or similar static file server would also mitigate the issue.
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-7wqh-767x-r66v
- https://www.suse.com/security/cve/CVE-2025-27610.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-27610
- https://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583
- https://github.com/rack/rack
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27610.yml
- https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html
- https://security-tracker.debian.org/tracker/CVE-2025-27610
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.