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Critical
Cpanel
Missing Authentication for Critical Function

CVE-2026-41940

Description

cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.

Proof of Concept (POC) Links

Explore how this vulnerability can be reproduced or exploited.

https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.pyhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940