{"id":"CVE-2026-71209","state":"PUBLISHED","title":"audiobookshelf - %2F Encoding Discrepancy Bypasses Cover/Image Auth Exemption Regex, Enabling Unauthenticated Path Traversal","description":"audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET routes against req.path via a regex requiring a literal /items/:id/cover or /authors/:id/image shape, where req.path retains %2F sequences URL-encoded. CacheManager.handleCoverCache then joins this decoded value into a cache file path and streams the result before any database-backed ownership check.","publishedAt":"2026-08-05T06:59:16.579Z","updatedAt":"2026-08-10T11:45:13.437Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"TuranSec"},"assigner":"TuranSec","products":["advplyr audiobookshelf"],"affected":[{"vendor":"advplyr","product":"audiobookshelf","defaultStatus":"unknown","versions":[{"version":"2.19.1","status":"affected","lessThanOrEqual":"2.35.1","versionType":"custom"}],"programFiles":["server/routers/Auth.js","server/managers/CacheManager.js"]}],"references":["https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw","https://github.com/advplyr/audiobookshelf"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/71xxx/CVE-2026-71209.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71209","state":"PUBLISHED","datePublished":"2026-08-05T06:59:16.579Z","dateUpdated":"2026-08-10T11:45:13.437Z","assignerShortName":"TuranSec","assignerOrgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","dateReserved":"2026-08-05T06:56:15.799Z"},"containers":{"cna":{"title":"audiobookshelf - %2F Encoding Discrepancy Bypasses Cover/Image Auth Exemption Regex, Enabling Unauthenticated Path Traversal","descriptions":[{"lang":"en","value":"audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET routes against req.path via a regex requiring a literal /items/:id/cover or /authors/:id/image shape, where req.path retains %2F sequences URL-encoded. CacheManager.handleCoverCache then joins this decoded value into a cache file path and streams the result before any database-backed ownership check."}],"affected":[{"vendor":"advplyr","product":"audiobookshelf","defaultStatus":"unknown","versions":[{"version":"2.19.1","status":"affected","lessThanOrEqual":"2.35.1","versionType":"custom"}],"programFiles":["server/routers/Auth.js","server/managers/CacheManager.js"]}],"references":[{"url":"https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw","tags":["third-party-advisory"]},{"url":"https://github.com/advplyr/audiobookshelf","tags":["third-party-advisory"]}],"metrics":[{"other":{"type":"CVSS_3.1_severity","content":{"value":"HIGH"}}},{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22 Path Traversal","type":"CWE"}]}],"providerMetadata":{"shortName":"TuranSec","orgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","dateUpdated":"2026-08-10T11:45:13.437Z"},"credits":[{"lang":"en","value":"Sarvar Omonov","type":"finder"}],"source":{"discovery":"EXTERNAL"},"datePublic":"2026-08-05T06:59:16.579Z"},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T13:21:06.583401Z","id":"CVE-2026-71209","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-05T13:21:27.949Z"}}]}}}