CVE-2026-44184

HIGH 8.0

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

CVSS Score

8.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-346 CWE-942
Vendor	cleanuparr
Product	cleanuparr
Published	May 12, 2026
Last Updated	May 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Cleanuparr / Cleanuparr

< 2.9.10

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/Cleanuparr/Cleanuparr/security/advisories/GHSA-rwpc-36mg-fpvf