{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Sonarr",
          "vendor": "Sonarr",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.0.16.2942"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:sonarr:sonarr:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "03480656-DD06-48B9-AB6B-40F751EDAA17",
              "versionEndExcluding": "4.0.16.2942",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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\u0027t 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\u0027s 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: \u0027Deshabilitada para Direcciones Locales\u0027) 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 \u0027Autenticaci\u00f3n Requerida\u0027 de Sonarr est\u00e9 establecida en \u0027Habilitada\u0027, 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."
    }
  ],
  "id": "CVE-2026-30975",
  "lastModified": "2026-06-17T10:33:15.330",
  "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"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-30975",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-26T15:23:30.487188Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-25T21:16:41.453",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}