Critical cPanel & WHM Authentication Bypass Vulnerability (CVE-2026-41940) Discovered
In April 2026, a critical authentication bypass vulnerability, CVE-2026-41940, was discovered in cPanel & WHM, affecting versions prior to 11.110.0.97, 11.118.0.63, 11.126.0.54, 11.132.0.29, 11.134.0.20, and 11.136.0.5. This flaw allows remote, unauthenticated attackers to gain root-level administrative access by injecting arbitrary values into server-side session files, effectively bypassing all credential checks. Exploitation in the wild has been confirmed, with attackers leveraging this vulnerability to compromise entire systems, leading to data theft, malware deployment, or complete server erasure. cPanel has released patches to address this issue, and administrators are urged to update immediately to secure their systems. ([support.cpanel.net](https://support.cpanel.net/hc/en-us/articles/40073787579671-Security-CVE-2026-41940-cPanel-WHM-WP2-Security-Update-04-28-2026?utm_source=openai)) The emergence of this vulnerability underscores the critical importance of timely software updates and robust security practices. With the availability of public proof-of-concept exploits and active exploitation observed, organizations must prioritize patching and monitoring to mitigate the risk of unauthorized access and potential system compromise.
Kill Chain