CVE-2026-30975

{"id": "CVE-2026-30975", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2026-03-25T21:16:41.453", "references": [{"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-290"}]}], "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."}, {"lang": "es", "value": "Sonarr es un PVR para usuarios de Usenet y BitTorrent. Las versiones anteriores a la 4.0.16.2942 tienen una omisi\u00f3n de autenticaci\u00f3n que afectaba a los usuarios que hab\u00edan deshabilitado la autenticaci\u00f3n para direcciones locales (Autenticaci\u00f3n Requerida configurada como: 'Deshabilitada para Direcciones Locales') sin un proxy inverso ejecut\u00e1ndose delante de Sonarr que s\u00ed pasara la cabecera inv\u00e1lida. Los parches est\u00e1n disponibles en la versi\u00f3n 4.0.16.2942 en la rama nightly/develop y en la versi\u00f3n 4.0.16.2944 para las versiones stable/main. Algunas soluciones alternativas est\u00e1n disponibles. Aseg\u00farese de que la configuraci\u00f3n 'Autenticaci\u00f3n Requerida' de Sonarr est\u00e9 establecida en 'Habilitada', ejecute Sonarr detr\u00e1s de un proxy inverso, y/o no exponga Sonarr directamente a internet y, en su lugar, conf\u00ede en acceder a \u00e9l a trav\u00e9s de una VPN, Tailscale o una soluci\u00f3n similar."}], "lastModified": "2026-03-30T16:55:47.733", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:sonarr:sonarr:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "03480656-DD06-48B9-AB6B-40F751EDAA17", "versionEndExcluding": "4.0.16.2942"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}