CVE-2026-30975: Sonarr is a PVR for Usenet and BitTorrent users

Q: How do I fix CVE-2026-30975?

sonarr: upgrade to 4.0.16.2942. Exact commands for each OS are on this page.

Q: Is CVE-2026-30975 being exploited?

CVE-2026-30975 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-30975 affect?

CVE-2026-30975 affects sonarr. Severity is high (CVSS 8.1). 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 Addre

Routine

HIGH 8.1UPGRADE

CVE-2026-30975 is a high-severity flaw (CVSS 8.1) affecting sonarr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-290
Published	2026-03-25
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: sonarr

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-25 21:16 UTCPublished CVE record published
2026-06-17 10:33 UTCUpdated Record last modified

sonarr sonarr UPGRADE

Affected: < 4.0.16.2942

Fixed in: 4.0.16.2942

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sonarr || rpm -q sonarr || sonarr --version

2. UPGRADE to 4.0.16.2942 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sonarr

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sonarr

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-30975?

sonarr: upgrade to 4.0.16.2942. Exact commands for each OS are on this page.

Is CVE-2026-30975 being exploited?

CVE-2026-30975 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-30975 affect?

CVE-2026-30975 affects sonarr. Severity is high (CVSS 8.1). 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 Addre

How urgent is CVE-2026-30975?

Priority 39/100. High severity

Related CVEs

CVE-2026-30976 HIGH 8.6 UPGRADE Sonarr is a PVR for Usenet and BitTorrent users

References

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