Vulnerability in Cleanuparr (CVE-2026-44184)
Summary
Vulnerability in Cleanuparr (CVE-2026-44184). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2.9.10 or later.
Original description
The description as published by the source.
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: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-44184 has been found in Cleanuparr.
Successful exploitation can lead to full system takeover. CVSS score: 8.0/10.
What to do: upgrade Cleanuparr to 2.9.10 or later.
If unsure, ask your IT team or search "Cleanuparr CVE-2026-44184" on the vendor's site.
CVE-2026-44184 (Cleanuparr) — CWE-346 / CVSS v3 8.0
Attack vector: adjacent-network / unauthenticated
Patched: 2.9.10 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-346) exists in Cleanuparr.
Check the vendor advisory for the affected versions of Cleanuparr.
Severity: High (CVSS 8.0/10). Successful exploitation can lead to full system takeover.
Update to 2.9.10.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Cleanuparr' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'Cleanuparr' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Cleanuparrを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade Cleanuparr to 2.9.10ステージング環境で 2.9.10 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov