CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2026-22860
High (7.5) in rack rack. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in rack 2.2.22, 3.1.20, 3.2.5.
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.
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-548
- Published
- Modified
- Record from
- the NVD, synced
Affected
- rack:rack
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mxw3-3hh2-x2mh | RubyGems | rack | <2.2.22 | 2.2.22 |
| GHSA-mxw3-3hh2-x2mh | RubyGems | rack | >=3.0.0.beta1 <3.1.20 | 3.1.20 |
| GHSA-mxw3-3hh2-x2mh | RubyGems | rack | >=3.2.0 <3.2.5 | 3.2.5 |
References
- https://github.com/rack/rack/commit/75c5745c286637a8f049a33790c71237762069e7
- https://github.com/rack/rack/security/advisories/GHSA-mxw3-3hh2-x2mh
- 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