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Vulnerability record · CVE-2026-44184 · published 12 May 2026

CVE-2026-44184: Origin validation error vulnerability

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.

8.0 CVSS 3.1 High EPSS 0.19% · top 91.9% CWE-346 · Origin validation errorCWE-942 · CWE-942 Deferred
8.0CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

References

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

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Same products first, then exploited flaws of the same weakness class.

9.4CVE-2025-34291Langflow CORS misconfiguration leads to token theft and RCELangflow up to and including 1.6.9 ships an overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) and a refresh token …KEVEPSS 93%analysed8.8CVE-2015-4495Firefox PDF reader same-origin bypass allows file read and privilege gainThe PDF reader in Mozilla Firefox (before 39.0.3), Firefox ESR 38.x (before 38.1.1), and Firefox OS (before 2.2) fails to properly validate origin, l…KEVEPSS 69%analysed

Source: NIST National Vulnerability Database (record CVE-2026-44184), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.