CVE-2026-30975

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942	Release Notes
https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944	Release Notes
https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:sonarr:sonarr:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-25 21:16

Updated : 2026-06-17 10:33

NVD link : CVE-2026-30975

Mitre link : CVE-2026-30975

CVE.ORG link : CVE-2026-30975

JSON object : View

Products Affected

sonarr

sonarr

CWE

CWE-290

Authentication Bypass by Spoofing

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