ruby-rack: Rack is a modular Ruby web server interface
CVE-2026-34763 is fixed in 2 products on 1 platform, first by ruby-rack 3.2.4-1ubuntu1.1, released April 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, *, or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem path in the HTML output. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rmt-server · opensuse-leap 16.0 | 3.1.0-160000.1.1 | OPENSUSE-SU-2026:21640-1 | Aug 25, 2026 |
| rmt-server · sles 15.6 | 2.27-150500.3.47.1 | SUSE-SU-2026:2487-1 | Jun 22, 2026 |
| rmt-server · sles 16.0 | 3.1.0-160000.1.1 | SUSE-SU-2026:23321-1 | Aug 25, 2026 |
| ruby-rack · Debian 12.15 (bookworm) | 2.2.22-0+deb12u2 | DEBIAN-CVE-2026-34763 | Apr 2, 2026 |
| ruby-rack · Debian 13.5 (trixie) | 3.1.20-0+deb13u2 | DEBIAN-CVE-2026-34763 | Apr 2, 2026 |
| ruby-rack · Debian 14 | 3.2.6-2 | DEBIAN-CVE-2026-34763 | Apr 2, 2026 |
| ruby-rack · Ubuntu 18.04.6 LTS (bionic) | 1.6.4-4ubuntu0.2+esm10 | ruby-rack 1.6.4-4ubuntu0.2+esm10 | Apr 30, 2026 |
| ruby-rack · Ubuntu 22.04.1 LTS (jammy) | 2.1.4-5ubuntu1.2+esm3 | ruby-rack 2.1.4-5ubuntu1.2+esm3 | Apr 30, 2026 |
| ruby-rack · Ubuntu 24.04.5 LTS (noble) | 2.2.7-1ubuntu0.7 | ruby-rack 2.2.7-1ubuntu0.7 | Apr 30, 2026 |
| ruby-rack · Ubuntu 25.10 (questing) | 3.1.16-0.1ubuntu0.3 | ruby-rack 3.1.16-0.1ubuntu0.3 | Apr 30, 2026 |
| ruby-rack · Ubuntu 26.04.1 LTS (resolute) | 3.2.4-1ubuntu1.1 | ruby-rack 3.2.4-1ubuntu1.1 | Apr 2, 2026 |
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