CVE-2026-25500

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.

Routine
CVSS
5.4
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0027
19th percentile

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

ProductFixed inFixReleased
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

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.