{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73291","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-11T19:42:11.450Z","datePublished":"2026-08-12T14:48:21.783Z","dateUpdated":"2026-08-13T16:23:07.044Z"},"containers":{"cna":{"title":"Seerr: Path traversal to RCE via /avatarproxy image cache filename from upstream ETag","problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/seerr-team/seerr/security/advisories/GHSA-mc6w-69r3-62h8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/seerr-team/seerr/security/advisories/GHSA-mc6w-69r3-62h8"},{"name":"https://github.com/seerr-team/seerr/commit/f484791105bd81bd5404e01410431ee6fe5769c2","tags":["x_refsource_MISC"],"url":"https://github.com/seerr-team/seerr/commit/f484791105bd81bd5404e01410431ee6fe5769c2"},{"name":"https://github.com/seerr-team/seerr/releases/tag/v3.4.0","tags":["x_refsource_MISC"],"url":"https://github.com/seerr-team/seerr/releases/tag/v3.4.0"}],"affected":[{"vendor":"seerr-team","product":"seerr","versions":[{"version":"< 3.4.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-12T14:48:21.783Z"},"descriptions":[{"lang":"en","value":"Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Prior to version 3.4.0, Seerr's ImageProxy in server/lib/imageproxy.ts uses the upstream ETag and Content-Type response headers to build a cache filename for the unauthenticated GET /avatarproxy/:jellyfinUserId route, allowing a malicious or compromised Jellyfin or Emby server, or a man-in-the-middle attacker on a plaintext media-server connection, to supply traversal sequences that path.join and fs.writeFile normalize outside the cache directory, overwrite /app/dist/index.js or other files, and execute code as the node user after a container restart. This issue is fixed in version 3.4.0."}],"source":{"advisory":"GHSA-mc6w-69r3-62h8","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T16:22:56.578886Z","id":"CVE-2026-73291","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-13T16:23:07.044Z"}}]}}