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CVE-2026-44183

CRITICAL Exploitation: PoC
9.8
CVSS 3.1
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, TrustedNetworkAuthenticationHandler.ResolveClientIp parses the leftmost entry of the X-Forwarded-For header as the client IP. That entry is attacker-controlled — X-Forwarded-For is append-only, so the leftmost value is whatever the original HTTP client claimed. By sending a spoofed local IP in the header, an unauthenticated remote attacker passes the trusted-network check and is logged in as the Cleanuparr administrator. This vulnerability is fixed in 2.9.10.

Metadata

CVE ID
CVE-2026-44183
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-05 14:39 UTC
Published
2026-05-12 17:32 UTC
Last updated
2026-05-13 14:40 UTC
Primary CWE
CWE-290
CWE-290: Authentication Bypass by Spoofing
Vendor / Product
Cleanuparr / Cleanuparr
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Cleanuparr Cleanuparr — < 2.9.10
Weakness (CWE)
CWESourceDescription
CWE-290 cna CWE-290: Authentication Bypass by Spoofing
CWE-348 cna CWE-348: Use of Less Trusted Source
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References (1)
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