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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-41940 ↗
- docs.cpanel.net/release-notes/release-notes ↗
- docs.wpsquared.com/changelogs/versions/changelog/ ↗
- support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ↗
- www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026 ↗
- www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow ↗
- labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/ ↗
- www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/ ↗
- github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py ↗
- www.cisa.gov/known-exploited-vulnerabilities-catalog ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.