CVE-2026-30976 Sonarr Path Traversal vulnerability
Unauthenticated attackers can read arbitrary files on Windows systems via path traversal, exposing sensitive configuration and system data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-30976?
CVE-2026-30976 is a high-severity path traversal vulnerability in Sonarr, published on 25 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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 from the API were not limited to the directory on disk they were intended to be served from. This problem has been patched in 4.0.17.2950 in the nightly/develop branch or 4.0.17.2952 for stable/main releases. It's possible to work around the issue by only hosting Sonarr on a secure internal network and accessing it via VPN, Tailscale or similar solution outside that network.
Weakness: CWE-22
Which versions are affected by CVE-2026-30976?
It affects 1 product.
Products include Sonarr Sonarr.
How do I fix CVE-2026-30976?
No fix has been published for CVE-2026-30976 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-30976 being exploited?
There is no known exploitation of CVE-2026-30976 in the wild and no public exploit code.
Other vulnerabilities in Sonarr
Sources
Also known as GHSA-h393-v5hm-6h8f.