CVE-2026-22860Rack is a modular Ruby web server interface.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-22, CWE-548
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
rack rack rack:rack | before 2.2.22; from 3.0.0 before 3.1.20; from 3.2.0 before 3.2.5 | NVD |
References
- https://github.com/rack/rack/commit/75c5745c286637a8f049a33790c71237762069e7patch
- https://github.com/rack/rack/security/advisories/GHSA-mxw3-3hh2-x2mhexploit, mitigation, vendor-advisory
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.