Description
Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory`’s path check used a string prefix match on the expanded path. A request like `/../root_example/` can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
rack rack
< 2.2.22affected>= 3.0.0.beta1, < 3.1.20affected>= 3.2.0, < 3.2.5affected
References
- https://github.com/rack/rack/security/advisories/GHSA-mxw3-3hh2-x2mh ↗
- https://github.com/rack/rack/commit/75c5745c286637a8f049a33790c71237762069e7 ↗
- https://access.redhat.com/security/cve/CVE-2026-22860 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2440737 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22860.json ↗