{"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": "2026-08-12T14:48:21.783Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "seerr", "vendor": "seerr-team", "versions": [{"status": "affected", "version": "< 3.4.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-73291", "lastModified": "2026-08-12T15:18:33.020", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 1.6, "impactScore": 5.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-12T15:18:33.020", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/seerr-team/seerr/commit/f484791105bd81bd5404e01410431ee6fe5769c2"}, {"source": "security-advisories@github.com", "url": "https://github.com/seerr-team/seerr/releases/tag/v3.4.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/seerr-team/seerr/security/advisories/GHSA-mc6w-69r3-62h8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}