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CVE-2026-44184— Cleanuparr: Reflective CORS combined with trusted-network auth allows cross-origin admin API reads

Quick assessment

Affected
Cleanuparr Cleanuparr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cleanuparr是Cleanuparr开源的一个自动化清理下载队列中无效文件的工具。 Cleanuparr 2.9.10之前版本存在访问控制错误漏洞，该漏洞源于全局CORS策略反映每个请求的Origin并结合AllowCredentials()，当启用DisableAuthForLocalAddresses时，可能导致任何网站读取经过身份验证的API响应，包括管理员永久API密钥。

CVSS 8.0 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cleanuparr Cleanuparr < 2.9.10 affected
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I. Basic Information for CVE-2026-44184

Vulnerability Information
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Vulnerability Title
Cleanuparr: Reflective CORS combined with trusted-network auth allows cross-origin admin API reads
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Cleanuparr 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cleanuparr是Cleanuparr开源的一个自动化清理下载队列中无效文件的工具。 Cleanuparr 2.9.10之前版本存在访问控制错误漏洞，该漏洞源于全局CORS策略反映每个请求的Origin并结合AllowCredentials()，当启用DisableAuthForLocalAddresses时，可能导致任何网站读取经过身份验证的API响应，包括管理员永久API密钥。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cleanuparr Cleanuparr < 2.9.10 -

II. Public POCs for CVE-2026-44184

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III. Intelligence Information for CVE-2026-44184

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Vendor Advisories for CVE-2026-44184 (1)

IV. Related Vulnerabilities

Same product: Cleanuparr
Same vendor: Cleanuparr
Same weakness: CWE-346

V. Comments for CVE-2026-44184

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