What is CVE-2026-30975?

CVE-2026-30975 is a high-severity vulnerability in Sonarr, classified under Authentication Bypass by Spoofing. CVSS score: 8.1/10. Published 2026-03-25.

How severe is CVE-2026-30975?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Sonarr

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 Addr…

EPSS: 0.000 (11.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Sonarr — versions < 4.0.16.2942

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r (x_refsource_CONFIRM)
https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942 (x_refsource_MISC)
https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-30975?: CVE-2026-30975 is a high-severity vulnerability in Sonarr, classified under Authentication Bypass by Spoofing. CVSS score: 8.1/10. Published 2026-03-25.
How severe is CVE-2026-30975?: High severity. CVSS v3 base score is 8.1 out of 10.