CVE-2026-73291

{"id": "CVE-2026-73291", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73291", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-13T16:22:56.578886Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 5.5, "exploitabilityScore": 1.6}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "seerr-team", "product": "seerr", "versions": [{"status": "affected", "version": "< 3.4.0"}]}]}], "published": "2026-08-12T15:18:33.020", "references": [{"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", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-94"}]}], "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."}, {"lang": "es", "value": "Seerr es un gestor de solicitudes y descubrimiento de medios de c\u00f3digo abierto para Jellyfin, Plex y Emby. Antes de la versi\u00f3n 3.4.0, el ImageProxy de Seerr en server/lib/imageproxy.ts utiliza los encabezados de respuesta ETag y Content-Type del servidor de origen para construir un nombre de archivo de cach\u00e9 para la ruta GET /avatarproxy/:jellyfinUserId no autenticada, permitiendo que un servidor Jellyfin o Emby malicioso o comprometido, o un atacante man-in-the-middle en una conexi\u00f3n de servidor de medios en texto plano, suministre secuencias de recorrido que path.join y fs.writeFile normalizan fuera del directorio de cach\u00e9, sobrescriba /app/dist/index.js u otros archivos, y ejecute c\u00f3digo como el usuario node despu\u00e9s de un reinicio del contenedor. Este problema est\u00e1 solucionado en la versi\u00f3n 3.4.0."}], "lastModified": "2026-10-24T15:10:00.190", "sourceIdentifier": "security-advisories@github.com"}