CVE-2026-34763
Fixed in a distro release EPSS <1%CVSS 5.3
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.
Products: Rack
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| RubyGems | rack | 2.2.23 |
| RubyGems | rack | 3.1.21 |
| RubyGems | rack | 3.2.6 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | gitlab-exporter-18.10 | 18.10.3-r0 |
| Chainguard | gitlab-exporter-18.7 | no fix |
| Chainguard | gitlab-exporter-18.8 | 18.8.9-r0 |
| Chainguard | gitlab-exporter-18.9 | 18.9.5-r0 |
| Chainguard | gitlab-rails-ce-18.1 | 18.1.6-r13 |
| Chainguard | gitlab-rails-ce-18.10 | 18.10.4-r0 |
| Chainguard | gitlab-rails-ce-18.2 | no fix |
| Chainguard | gitlab-rails-ce-18.3 | no fix |
| Chainguard | gitlab-rails-ce-18.4 | no fix |
| Chainguard | gitlab-rails-ce-18.5 | no fix |
| Chainguard | gitlab-rails-ce-18.6 | no fix |
| Chainguard | gitlab-rails-ce-18.7 | no fix |
| Chainguard | gitlab-rails-ce-18.8 | 18.8.10-r0 |
| Chainguard | gitlab-rails-ce-18.9 | 18.9.6-r0 |
| Chainguard | gitlab-rails-ce-fips-18.1 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.10 | 18.10.4-r0 |
| Chainguard | gitlab-rails-ce-fips-18.2 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.3 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.4 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.5 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.6 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.7 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.8 | 18.8.10-r0 |
| Chainguard | gitlab-rails-ce-fips-18.9 | 18.9.6-r0 |
| Chainguard | kube-fluentd-operator | 1.18.2-r67 |
| Chainguard | kube-fluentd-operator | 1.18.2-r60 |
| Chainguard | logstash-8.17 | no fix |
| Chainguard | logstash-8.17-iamguarded-compat | no fix |
| Chainguard | logstash-8.17-with-output-opensearch | no fix |
| Chainguard | logstash-8.18 | no fix |
| Chainguard | logstash-8.18-iamguarded-compat | no fix |
| Chainguard | logstash-8.18-with-output-opensearch | no fix |
| Chainguard | logstash-8.19 | 8.19.14-r3 |
| Chainguard | logstash-8.19-iamguarded-compat | 8.19.14-r3 |
| Chainguard | logstash-8.19-with-output-opensearch | 8.19.14-r3 |
| Chainguard | logstash-9.0 | 9.0.8-r20 |
| Chainguard | logstash-9.0-iamguarded-compat | 9.0.8-r20 |
| Chainguard | logstash-9.0-with-output-opensearch | 9.0.8-r20 |
| Chainguard | logstash-9.1 | 9.1.10-r6 |
| Chainguard | logstash-9.1-bitnami-compat | 9.1.10-r6 |
| Chainguard | logstash-9.1-iamguarded-compat | 9.1.10-r6 |
| Chainguard | logstash-9.1-with-output-opensearch | 9.1.10-r6 |
| Chainguard | logstash-9.2 | 9.2.8-r2 |
| Chainguard | logstash-9.2-iamguarded-compat | 9.2.8-r2 |
| Chainguard | logstash-9.2-with-output-opensearch | 9.2.8-r2 |
| Chainguard | logstash-9.3 | 9.3.3-r2 |
| Chainguard | logstash-9.3-iamguarded-compat | 9.3.3-r2 |
| Chainguard | logstash-9.3-with-output-opensearch | 9.3.3-r2 |
| Chainguard | pact-broker-docker | 2.137.0.2.118.0-r4 |
| Chainguard | pact-broker-docker-fips | 2.137.0.2.118.0-r2 |
| Chainguard | ruby3.2-rack-2.2 | 2.2.23-r0 |
| Chainguard | ruby3.2-rails-7.2 | 7.2.3.1-r1 |
| Chainguard | ruby3.2-rails-7.2 | 7.2.3.1-r2 |
| Chainguard | ruby3.2-rails-8.0 | 8.0.5-r0 |
| Chainguard | ruby3.3-rack-2.2 | 2.2.23-r0 |
| Chainguard | ruby3.3-rack-2.2 | 2.2.22-r0 |
| Chainguard | ruby3.4-rack-2.2 | 2.2.23-r0 |
| Chainguard | ruby3.4-rails-7.2 | 7.2.3.1-r1 |
| Chainguard | ruby3.4-rails-8.0 | 8.0.5-r2 |
| Chainguard | ruby3.4-rails-8.0 | 8.0.5-r1 |
| Chainguard | ruby4.0-rack-2.2 | 2.2.23-r0 |
| Debian 12 | ruby-rack | 2.2.22-0+deb12u2 |
| Debian 13 | ruby-rack | 3.1.20-0+deb13u2 |
| Debian 14 | ruby-rack | 3.2.6-2 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP5 | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP6 | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise Server 16.0 | rmt-server | 3.1.0-160000.1.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | rmt-server | 2.27-150500.3.47.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | rmt-server | 3.1.0-160000.1.1 |
| Ubuntu 24.04 LTS | ruby-rack | 2.2.7-1ubuntu0.7 |
| Ubuntu 25.10 | ruby-rack | 3.1.16-0.1ubuntu0.3 |
| Ubuntu 26.04 LTS | ruby-rack | no fix |
| Ubuntu Pro 14.04 LTS | ruby-rack | 1.5.2-3+deb8u3ubuntu1~esm11 |
| Ubuntu Pro 16.04 LTS | ruby-rack | 1.6.4-3ubuntu0.2+esm10 |
| Ubuntu Pro 18.04 LTS | ruby-rack | 1.6.4-4ubuntu0.2+esm10 |
| Ubuntu Pro 20.04 LTS | ruby-rack | 2.0.7-2ubuntu0.1+esm10 |
| Ubuntu Pro 22.04 LTS | ruby-rack | 2.1.4-5ubuntu1.2+esm3 |
| Wolfi | kube-fluentd-operator | 1.18.2-r67 |
| Wolfi | kube-fluentd-operator | 1.18.2-r60 |
| Wolfi | logstash-9.1 | 9.1.10-r6 |
| Wolfi | logstash-9.1-bitnami-compat | 9.1.10-r6 |
| Wolfi | logstash-9.1-iamguarded-compat | 9.1.10-r6 |
| Wolfi | logstash-9.1-with-output-opensearch | 9.1.10-r6 |
| Wolfi | logstash-9.2 | 9.2.8-r2 |
| Wolfi | logstash-9.2-iamguarded-compat | 9.2.8-r2 |
| Wolfi | logstash-9.2-with-output-opensearch | 9.2.8-r2 |
| Wolfi | logstash-9.3 | 9.3.3-r2 |
| Wolfi | logstash-9.3-iamguarded-compat | 9.3.3-r2 |
| Wolfi | logstash-9.3-with-output-opensearch | 9.3.3-r2 |
| Wolfi | ruby3.2-rack-2.2 | 2.2.23-r0 |
| Wolfi | ruby3.2-rails-8.0 | 8.0.5-r0 |
| Wolfi | ruby3.3-rack-2.2 | 2.2.23-r0 |
| Wolfi | ruby3.3-rack-2.2 | 2.2.22-r0 |
| Wolfi | ruby3.4-rack-2.2 | 2.2.23-r0 |
| Wolfi | ruby3.4-rails-8.0 | 8.0.5-r2 |
| Wolfi | ruby4.0-rack-2.2 | 2.2.23-r0 |
| openSUSE Leap 16.0 | rmt-server | 3.1.0-160000.1.1 |
| openSUSE Tumbleweed | rubygem-rack-2.2 | 2.2.23-1.1 |