{"id":"CVE-2026-25500","summary":"Rack's Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href","details":"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.","aliases":["GHSA-whrj-4476-wvmp"],"modified":"2026-04-10T04:17:58.334960Z","published":"2026-02-18T18:59:31.964Z","related":["CGA-c5jr-5288-fhr3","MGASA-2026-0075","openSUSE-SU-2026:10286-1"],"database_specific":{"cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25500.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25500.json"},{"type":"ADVISORY","url":"https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25500"},{"type":"FIX","url":"https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rack/rack","events":[{"introduced":"0"},{"fixed":"0cc2e00b22dffc33955ef912569f01e515a406e1"},{"introduced":"52901caf09ebcda879512a8605059963a49df55d"},{"fixed":"65044344e4780d80b409f9ba27df41b6307b5ff5"},{"introduced":"b68251c03788ff39d4a4b25424df7360426e4afd"},{"fixed":"bb5f3555bd12b9065112353e829298b3b5623ceb"},{"fixed":"f2f225f297b99fbee3d9f51255d41f601fc40aff"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2.2.22"},{"introduced":"3.0.0"},{"fixed":"3.1.20"},{"introduced":"3.2.0"},{"fixed":"3.2.5"}]}}],"versions":["0.1","0.2","0.3","1.0","1.3.0","1.3.0.beta","1.3.0.beta2","1.4.0","1.4.1","1.5.0","1.5.1","1.6.0.beta","2.0.0","2.0.0.alpha","2.0.0.rc1","2.0.1","2.1.0","2.2.0","2.2.3","2.2.4","3.0.0","v2.2.1","v2.2.10","v2.2.11","v2.2.12","v2.2.13","v2.2.14","v2.2.15","v2.2.16","v2.2.17","v2.2.18","v2.2.19","v2.2.2","v2.2.20","v2.2.21","v2.2.5","v2.2.6","v2.2.6.1","v2.2.6.2","v2.2.7","v2.2.8","v2.2.9","v3.1.0","v3.1.10","v3.1.11","v3.1.12","v3.1.13","v3.1.14","v3.1.15","v3.1.16","v3.1.17","v3.1.18","v3.1.19","v3.1.2","v3.1.3","v3.1.4","v3.1.5","v3.1.6","v3.1.7","v3.1.8","v3.1.9","v3.2.0","v3.2.1","v3.2.2","v3.2.3","v3.2.4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-25500.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}