ruby-rack: Rack is a modular Ruby web server interface
CVE-2026-25500 is fixed in ruby-rack on 1 platform, first by ruby-rack 3.2.4-1ubuntu1, released February 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ruby-rack · Debian 12.15 (bookworm) | 2.2.22-0+deb12u1 | DEBIAN-CVE-2026-25500 | Feb 18, 2026 |
| ruby-rack · Debian 13.5 (trixie) | 3.1.20-0+deb13u1 | DEBIAN-CVE-2026-25500 | Feb 18, 2026 |
| ruby-rack · Debian 14 | 3.2.5-1 | DEBIAN-CVE-2026-25500 | Feb 18, 2026 |
| ruby-rack · Ubuntu 20.04 LTS (focal) | 2.0.7-2ubuntu0.1+esm9 | ruby-rack 2.0.7-2ubuntu0.1+esm9 | Mar 12, 2026 |
| ruby-rack · Ubuntu 22.04.1 LTS (jammy) | 2.1.4-5ubuntu1.2+esm2 | ruby-rack 2.1.4-5ubuntu1.2+esm2 | Mar 12, 2026 |
| ruby-rack · Ubuntu 24.04.5 LTS (noble) | 2.2.7-1ubuntu0.6 | ruby-rack 2.2.7-1ubuntu0.6 | Mar 12, 2026 |
| ruby-rack · Ubuntu 25.10 (questing) | 3.1.16-0.1ubuntu0.2 | ruby-rack 3.1.16-0.1ubuntu0.2 | Mar 12, 2026 |
| ruby-rack · Ubuntu 26.04.1 LTS (resolute) | 3.2.4-1ubuntu1 | ruby-rack 3.2.4-1ubuntu1 | Feb 18, 2026 |
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