CVE-2026-30976: Sonarr is a PVR for Usenet and BitTorrent users

This month

HIGH 8.6REMOTEUPGRADE

CVE-2026-30976 is a high-severity flaw (CVSS 8.6) 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. In versions on the 4.x branch prior to 4.0.17.2950, an unauthenticated remote attacker can potentially read any file readable by the Sonarr process. These include application configuration files (containing API keys and database credentials), Windows system files, and any user-accessible files on the same drive This issue only impacts Windows systems; macOS and Linux are unaffected. Files returned

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-22
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: >= 4.0.0.741 and < 4.0.17.2950

Fixed in: 4.0.17.2950

Safe to downgrade to: a release before 4.0.0.741

1. Check installed version

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

2. UPGRADE to 4.0.17.2950 (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.

3. If no update is available yet, DOWNGRADE to a release before 4.0.0.741 (Debian / Ubuntu)

apt-cache madison sonarr sudo apt install sonarr=<VERSION_BEFORE_4.0.0.741> sudo apt-mark hold sonarr

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sonarr sudo dnf downgrade sonarr-<VERSION_BEFORE_4.0.0.741> sudo dnf versionlock add sonarr

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-30976?

sonarr: upgrade to 4.0.17.2950. Exact commands for each OS are on this page.

Is CVE-2026-30976 being exploited?

CVE-2026-30976 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-2026-30976 affect?

CVE-2026-30976 affects sonarr. Severity is high (CVSS 8.6). Sonarr is a PVR for Usenet and BitTorrent users. In versions on the 4.x branch prior to 4.0.17.2950, an unauthenticated remote attacker can potentially read any file readable by the Sonarr process. These include application configuration fi

How urgent is CVE-2026-30976?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

Software pages

Windows vulnerabilities · macOS vulnerabilities

Related CVEs

CVE-2026-30975 HIGH 8.1 UPGRADE Sonarr is a PVR for Usenet and BitTorrent users

References

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