{"id":"CVE-2026-25500","state":"PUBLISHED","title":"Rack's Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href","description":"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.","publishedAt":"2026-02-18T18:59:31.964Z","updatedAt":"2026-02-18T19:42:35.101Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["rack rack"],"affected":[{"vendor":"rack","product":"rack","versions":[{"version":"< 2.2.22","status":"affected"},{"version":">= 3.0.0.beta1, < 3.1.20","status":"affected"},{"version":">= 3.2.0, < 3.2.5","status":"affected"}]}],"references":["https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp","https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/25xxx/CVE-2026-25500.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-25500","state":"PUBLISHED","datePublished":"2026-02-18T18:59:31.964Z","dateUpdated":"2026-02-18T19:42:35.101Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-02T18:21:42.485Z"},"containers":{"cna":{"title":"Rack's Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"rack","product":"rack","versions":[{"version":"< 2.2.22","status":"affected"},{"version":">= 3.0.0.beta1, < 3.1.20","status":"affected"},{"version":">= 3.2.0, < 3.2.5","status":"affected"}]}],"references":[{"url":"https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp","name":"https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff","name":"https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-02-18T18:59:31.964Z"},"source":{"advisory":"GHSA-whrj-4476-wvmp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-18T19:42:04.480536Z","id":"CVE-2026-25500","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-18T19:42:35.101Z"}}]}}}