{"affected":[{"product":"bazarr","source":"CNA: GitHub_M","vendor":"morpheus65535","versions":[{"status":"affected","version":"< 1.5.7-beta.14"}]}],"cveId":"CVE-2026-61826","cwes":["CWE-352","CWE-862"],"description":"Bazarr is a companion application to Sonarr and Radarr. Prior to 1.5.7-beta.14, the `api_ns_plex` namespace in `bazarr/api/plex/oauth.py` omits `@authenticate` on its Resource handlers, while normal APIs require an API key and no global authentication hook compensates. Anonymous callers can invoke `POST /api/plex/oauth/logout` to clear credentials and disable the integration, or `POST /api/plex/apikey` to persist an attacker-selected key, without a PIN, account or state precondition. `POST /api/plex/oauth/pin` and `GET /api/plex/oauth/pin/<pin_id>/check` additionally allow an attacker who completes a PIN with an attacker-controlled Plex account to bind that account's token to the instance. `PlexPinCheck` skips state validation when `state_param` is absent and merely logs a mismatch without stopping execution. `POST /api/plex/select-server`, `POST /api/plex/oauth/servers`, `POST /api/plex/webhook/create`, `POST /api/plex/webhook/delete` and `POST /api/plex/encrypt-apikey` expose further `write_config()` operations. Attacker-controlled server URLs feed later outbound requests carrying the configured API key in `X-Plex-Token`, enabling server-side request forgery and credential exposure in addition to persistent configuration tampering and integration denial of service. Version 1.5.7-beta.14 closes the anonymous API-mutation path by adding authentication; complete OAuth state validation is not established and remains a separate residual for curator review.","epss":{"date":"2026-11-04","percentile":0.18312,"score":0.00263},"exploits":[],"kev":null,"metrics":[{"score":10,"severity":"critical","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793845508949,"publishedAt":1793380363384,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/morpheus65535/bazarr/security/advisories/GHSA-fvcv-hh55-x3r4"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/morpheus65535/bazarr/commit/4bd29252feebd0803e84cc3ce1bdd24c3a076ed4"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/morpheus65535/bazarr/commit/f9a8a9514944be0e7b826e67cde042cebfe9c97e"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/morpheus65535/bazarr/tree/v1.5.7-beta.14"}],"remediation":[],"revision":"ccf96997c9840626a42e4fedc5094373539dd5da360e8ce78b47b9f559baf9b6","sources":[{"modifiedAt":1793845508949,"name":"CNA: GitHub_M","retrievedAt":1793848252077,"url":"https://www.cve.org/CVERecord?id=CVE-2026-61826"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793848264336,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-61826"}],"ssvc":{"assessedAt":1793845491591,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Bazarr: Plex OAuth API namespace is entirely unauthenticated, allowing config tampering, integration takeover and server-side request forgery","updatedAt":1793848264336}