{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-30975", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-07T17:53:48.816Z", "datePublished": "2026-03-25T21:08:15.426Z", "dateUpdated": "2026-03-25T21:08:15.426Z"}, "containers": {"cna": {"title": "Sonarr Authentication Bypass vulnerability", "problemTypes": [{"descriptions": [{"cweId": "CWE-290", "lang": "en", "description": "CWE-290: Authentication Bypass by Spoofing", "type": "CWE"}]}], "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"}}], "references": [{"name": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r"}, {"name": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942", "tags": ["x_refsource_MISC"], "url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942"}, {"name": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944", "tags": ["x_refsource_MISC"], "url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944"}], "affected": [{"vendor": "Sonarr", "product": "Sonarr", "versions": [{"version": "< 4.0.16.2942", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-25T21:08:15.426Z"}, "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."}], "source": {"advisory": "GHSA-h5qx-5hjf-7c9r", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-30975", "lastModified": "2026-03-25T21:16:41.453", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-25T21:16:41.453", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942"}, {"source": "security-advisories@github.com", "url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944"}, {"source": "security-advisories@github.com", "url": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}