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Vulnerability record · CVE-2026-22860 · published 18 February 2026

CVE-2026-22860: Rack path traversal vulnerability

Rack · Rack

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.

7.5 CVSS 3.1 High EPSS 0.68% · top 49.7% CWE-22 · Path traversalCWE-548 · CWE-548
7.5CVSS 3.1 base score
0.68%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
15 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/rack/rack/commit/75c5745c286637a8f049a33790c71237762069e7 Patch
https://github.com/rack/rack/security/advisories/GHSA-mxw3-3hh2-x2mh ExploitMitigationVendor 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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-22860), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.