CVE-2026-30976 is a high-severity (CVSS 7.5) path traversal vulnerability affecting Sonarr 4.x versions prior to 4.0.17.2950 on Windows systems. An unauthenticated remote attacker can exploit this flaw to read any file accessible by the Sonarr process, including sensitive configuration files containing API keys and database credentials. The attack requires no user interaction and has a low attack complexity, posing a significant risk of data exposure. While there is no known active exploitation or public exploit code, the vulnerability has garnered some community discussion. Users are strongly advised to update to Sonarr 4.0.17.2950 (nightly) or 4.0.17.2952 (stable) to mitigate this risk.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.0.0.741, < 4.0.17.2950CPE matchmatch criteria | cpe:2.3:a:sonarr:sonarr:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.