PT-2026-40330 · Unknown · Cleanuparr

Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-44183

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Cleanuparr versions prior to 2.9.10

Description TrustedNetworkAuthenticationHandler.ResolveClientIp parses the leftmost entry of the 'X-Forwarded-For' header as the client IP. Because this header is append-only, the leftmost value is controlled by the HTTP client. An unauthenticated remote attacker can send a spoofed local IP in this header to bypass the trusted-network check and gain access as the Cleanuparr administrator.

Recommendations Update to version 2.9.10.

Exploit

Fix

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-348

CWE-290

Related Identifiers

CVE-2026-44183

Affected Products

Cleanuparr

References · 4

• 🔥 https://github.com/Cleanuparr/Cleanuparr/security/advisories/GHSA-8q44-v65j-jc3q · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-44183 · Security Note
• https://t.me/CVEtracker/53536 · Telegram Post
• https://twitter.com/CVEnew/status/2054340984566092259 · Twitter Post