CVE-2026-25500
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.
- Rack
- < 2.2.22, 3.1.20, 3.2.5
- Fix
- Available
- CVSS 3.1
- 5.4 MEDIUM
- EPSS
- 0.2% (13th percentile)
- Weakness
- CWE-79
- NVD status
- Analyzed
- Published
- 2026-02-18
No indexed exploits for CVE-2026-25500 yet
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No exploit for CVE-2026-25500 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.