CVE-2026-44184
Cleanuparr: Reflective CORS combined with trusted-network auth allows cross-origin admin API reads
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
12 May 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
Cleanuparr is a tool for automating the cleanup of unwanted or blocked files in Sonarr, Radarr, and supported download clients like qBittorrent. Prior to 2.9.10, Cleanuparr's global CORS policy reflects every request Origin and combines it with AllowCredentials(). When DisableAuthForLocalAddresses is enabled, the API also authenticates requests purely by source IP via TrustedNetworkAuthenticationHandler. The combination lets any website that an admin (or any user on a trusted IP) visits read authenticated API responses cross-origin — including the admin's permanent API key. This vulnerability is fixed in 2.9.10.
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Cleanuparr · CleanuparrWant to know if your infrastructure is exposed to this?
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