Vulnerability Details CVE-2026-30976
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.0%
CVSS Severity
CVSS v3 Score 8.6
References
Products affected by CVE-2026-30976
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cpe:2.3:a:sonarr:sonarr:4.0.0.741
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cpe:2.3:a:sonarr:sonarr:4.0.0.748
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cpe:2.3:a:sonarr:sonarr:4.0.0.825
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cpe:2.3:a:sonarr:sonarr:4.0.0.836
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cpe:2.3:a:sonarr:sonarr:4.0.0.924
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cpe:2.3:a:sonarr:sonarr:4.0.1.1014
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cpe:2.3:a:sonarr:sonarr:4.0.1.1047
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cpe:2.3:a:sonarr:sonarr:4.0.1.1096
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cpe:2.3:a:sonarr:sonarr:4.0.1.1114
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cpe:2.3:a:sonarr:sonarr:4.0.1.1131
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cpe:2.3:a:sonarr:sonarr:4.0.1.1168
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cpe:2.3:a:sonarr:sonarr:4.0.1.929
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cpe:2.3:a:sonarr:sonarr:4.0.1.933
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cpe:2.3:a:sonarr:sonarr:4.0.1.947
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cpe:2.3:a:sonarr:sonarr:4.0.1.953
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cpe:2.3:a:sonarr:sonarr:4.0.1.987
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cpe:2.3:a:sonarr:sonarr:4.0.10.2544
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cpe:2.3:a:sonarr:sonarr:4.0.10.2579
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cpe:2.3:a:sonarr:sonarr:4.0.10.2624
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cpe:2.3:a:sonarr:sonarr:4.0.10.2656
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cpe:2.3:a:sonarr:sonarr:4.0.11.2680
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cpe:2.3:a:sonarr:sonarr:4.0.11.2688
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cpe:2.3:a:sonarr:sonarr:4.0.11.2697
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cpe:2.3:a:sonarr:sonarr:4.0.11.2724
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cpe:2.3:a:sonarr:sonarr:4.0.11.2743
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cpe:2.3:a:sonarr:sonarr:4.0.11.2762
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cpe:2.3:a:sonarr:sonarr:4.0.11.2774
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cpe:2.3:a:sonarr:sonarr:4.0.11.2784
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cpe:2.3:a:sonarr:sonarr:4.0.11.2793
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cpe:2.3:a:sonarr:sonarr:4.0.11.2800
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cpe:2.3:a:sonarr:sonarr:4.0.11.2804
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cpe:2.3:a:sonarr:sonarr:4.0.11.2815
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cpe:2.3:a:sonarr:sonarr:4.0.12.2823
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cpe:2.3:a:sonarr:sonarr:4.0.12.2825
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cpe:2.3:a:sonarr:sonarr:4.0.12.2849
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cpe:2.3:a:sonarr:sonarr:4.0.12.2866
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cpe:2.3:a:sonarr:sonarr:4.0.12.2892
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cpe:2.3:a:sonarr:sonarr:4.0.12.2900
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cpe:2.3:a:sonarr:sonarr:4.0.13.2931
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cpe:2.3:a:sonarr:sonarr:4.0.13.2932
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cpe:2.3:a:sonarr:sonarr:4.0.13.2933
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cpe:2.3:a:sonarr:sonarr:4.0.13.2934
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cpe:2.3:a:sonarr:sonarr:4.0.14.2938
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cpe:2.3:a:sonarr:sonarr:4.0.14.2939
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cpe:2.3:a:sonarr:sonarr:4.0.15.2940
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cpe:2.3:a:sonarr:sonarr:4.0.15.2941
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cpe:2.3:a:sonarr:sonarr:4.0.16.2942
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cpe:2.3:a:sonarr:sonarr:4.0.16.2943
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cpe:2.3:a:sonarr:sonarr:4.0.16.2944
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cpe:2.3:a:sonarr:sonarr:4.0.16.2946
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cpe:2.3:a:sonarr:sonarr:4.0.2.1183
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cpe:2.3:a:sonarr:sonarr:4.0.2.1192
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cpe:2.3:a:sonarr:sonarr:4.0.2.1223
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cpe:2.3:a:sonarr:sonarr:4.0.2.1262
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cpe:2.3:a:sonarr:sonarr:4.0.2.1312
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cpe:2.3:a:sonarr:sonarr:4.0.2.1341
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cpe:2.3:a:sonarr:sonarr:4.0.2.1367
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cpe:2.3:a:sonarr:sonarr:4.0.2.1408
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cpe:2.3:a:sonarr:sonarr:4.0.3.1413
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cpe:2.3:a:sonarr:sonarr:4.0.3.1442
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cpe:2.3:a:sonarr:sonarr:4.0.3.1465
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cpe:2.3:a:sonarr:sonarr:4.0.3.1486
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cpe:2.3:a:sonarr:sonarr:4.0.4.1491
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cpe:2.3:a:sonarr:sonarr:4.0.4.1515
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cpe:2.3:a:sonarr:sonarr:4.0.4.1572
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cpe:2.3:a:sonarr:sonarr:4.0.4.1616
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cpe:2.3:a:sonarr:sonarr:4.0.4.1650
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cpe:2.3:a:sonarr:sonarr:4.0.4.1668
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cpe:2.3:a:sonarr:sonarr:4.0.4.1692
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cpe:2.3:a:sonarr:sonarr:4.0.4.1695
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cpe:2.3:a:sonarr:sonarr:4.0.4.1699
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cpe:2.3:a:sonarr:sonarr:4.0.5.1710
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cpe:2.3:a:sonarr:sonarr:4.0.5.1719
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cpe:2.3:a:sonarr:sonarr:4.0.5.1740
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cpe:2.3:a:sonarr:sonarr:4.0.5.1760
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cpe:2.3:a:sonarr:sonarr:4.0.5.1778
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cpe:2.3:a:sonarr:sonarr:4.0.5.1782
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cpe:2.3:a:sonarr:sonarr:4.0.5.1791
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cpe:2.3:a:sonarr:sonarr:4.0.5.1801
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cpe:2.3:a:sonarr:sonarr:4.0.6.1805
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cpe:2.3:a:sonarr:sonarr:4.0.6.1820
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cpe:2.3:a:sonarr:sonarr:4.0.6.1847
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cpe:2.3:a:sonarr:sonarr:4.0.7.1863
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cpe:2.3:a:sonarr:sonarr:4.0.7.1868
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cpe:2.3:a:sonarr:sonarr:4.0.8.1874
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cpe:2.3:a:sonarr:sonarr:4.0.8.1893
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cpe:2.3:a:sonarr:sonarr:4.0.8.1902
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cpe:2.3:a:sonarr:sonarr:4.0.8.1929
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cpe:2.3:a:sonarr:sonarr:4.0.8.1967
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cpe:2.3:a:sonarr:sonarr:4.0.8.1988
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cpe:2.3:a:sonarr:sonarr:4.0.8.2008
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cpe:2.3:a:sonarr:sonarr:4.0.8.2093
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cpe:2.3:a:sonarr:sonarr:4.0.8.2158
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cpe:2.3:a:sonarr:sonarr:4.0.8.2208
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cpe:2.3:a:sonarr:sonarr:4.0.8.2223
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cpe:2.3:a:sonarr:sonarr:4.0.9.2244
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cpe:2.3:a:sonarr:sonarr:4.0.9.2257
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cpe:2.3:a:sonarr:sonarr:4.0.9.2278
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cpe:2.3:a:sonarr:sonarr:4.0.9.2300
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cpe:2.3:a:sonarr:sonarr:4.0.9.2332
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cpe:2.3:a:sonarr:sonarr:4.0.9.2342
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cpe:2.3:a:sonarr:sonarr:4.0.9.2386
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cpe:2.3:a:sonarr:sonarr:4.0.9.2421
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cpe:2.3:a:sonarr:sonarr:4.0.9.2457
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cpe:2.3:a:sonarr:sonarr:4.0.9.2513