CVE-2026-44184

HIGH

Cleanuparr: Reflective CORS combined with trusted-network auth allows cross-origin admin API reads

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 8.0
EPSS 0.0012
EPSS Percentile 2.2%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-346 CWE-942
Status published
Products (1)
Cleanuparr/Cleanuparr < 2.9.10
Published May 12, 2026
Tracked Since May 13, 2026