CVEvulnerability
CVE-2026-25500
5.4 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-02-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
Description
Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory` generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the `javascript:` scheme (e.g. `javascript:alert(1)`), the generated index contains an anchor whose `href` is exactly `javascript:alert(1)`. Clicking the entry executes JavaScript in the browser (demonstrated with `alert(1)`). Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.
Affected configurations
• rack rack (< 2.2.22)
• rack rack (>= 3.0.0 < 3.1.20)
• rack rack (>= 3.2.0 < 3.2.5)
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff Patch
- https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp Exploit, Mitigation, Vendor Advisory