{"id":"CVE-2026-30975","state":"PUBLISHED","title":"Sonarr Authentication Bypass vulnerability","description":"Sonarr is a PVR for Usenet and BitTorrent users. Versions prior to 4.0.16.2942 have an authentication bypass that affected users that had disabled authentication for local addresses (Authentication Required set to: `Disabled for Local Addresses`) without a reverse proxy running in front of Sonarr that didn't not pass through the invalid header. Patches are available in version 4.0.16.2942 in the nightly/develop branch and version 4.0.16.2944 for stable/main releases. Some workarounds are available. Make sure Sonarr's Authentication Required setting is set to `Enabled`, run Sonarr behind a reverse proxy, and/or do not expose Sonarr directly to the internet and instead rely on accessing it through a VPN, Tailscale or a similar solution.","publishedAt":"2026-03-25T21:08:15.426Z","updatedAt":"2026-03-26T15:23:38.612Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["Sonarr Sonarr"],"affected":[{"vendor":"Sonarr","product":"Sonarr","versions":[{"version":"< 4.0.16.2942","status":"affected"}]}],"references":["https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r","https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942","https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944"],"weaknesses":["CWE-290"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/30xxx/CVE-2026-30975.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-30975","state":"PUBLISHED","datePublished":"2026-03-25T21:08:15.426Z","dateUpdated":"2026-03-26T15:23:38.612Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-07T17:53:48.816Z"},"containers":{"cna":{"title":"Sonarr Authentication Bypass vulnerability","descriptions":[{"lang":"en","value":"Sonarr is a PVR for Usenet and BitTorrent users. Versions prior to 4.0.16.2942 have an authentication bypass that affected users that had disabled authentication for local addresses (Authentication Required set to: `Disabled for Local Addresses`) without a reverse proxy running in front of Sonarr that didn't not pass through the invalid header. Patches are available in version 4.0.16.2942 in the nightly/develop branch and version 4.0.16.2944 for stable/main releases. Some workarounds are available. Make sure Sonarr's Authentication Required setting is set to `Enabled`, run Sonarr behind a reverse proxy, and/or do not expose Sonarr directly to the internet and instead rely on accessing it through a VPN, Tailscale or a similar solution."}],"affected":[{"vendor":"Sonarr","product":"Sonarr","versions":[{"version":"< 4.0.16.2942","status":"affected"}]}],"references":[{"url":"https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r","name":"https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942","name":"https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942","tags":["x_refsource_MISC"]},{"url":"https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944","name":"https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-290","lang":"en","description":"CWE-290: Authentication Bypass by Spoofing","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-25T21:08:15.426Z"},"source":{"advisory":"GHSA-h5qx-5hjf-7c9r","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-26T15:23:30.487188Z","id":"CVE-2026-30975","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-26T15:23:38.612Z"}}]}}}