CVE-2026-41940
cPanel and WHM Authentication Bypass via Login Flow
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
cPanel and WHM 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 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
| CWE | CWE-306 |
| Vendor | cpanel, l.l.c. |
| Product | cpanel & whm |
| Published | Apr 29, 2026 |
| Last Updated | Apr 29, 2026 |
Stay Ahead of the Next One
Get instant alerts for cpanel, l.l.c. cpanel & whm
Be the first to know when new critical vulnerabilities affecting cpanel, l.l.c. cpanel & whm are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
cPanel, L.L.C. / cPanel & WHM
11.110.0 < 11.110.0.97 11.118.0 < 11.118.0.63 11.126.0 < 11.126.0.54 11.132.0 < 11.132.0.29 11.134.0 < 11.134.0.20 11.136.0 < 11.136.0.5
cPanel, L.L.C. / WP Squared
11.136.1 < 11.136.1.7
References
support.cpanel.net: https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 docs.cpanel.net: https://docs.cpanel.net/release-notes/release-notes docs.wpsquared.com: https://docs.wpsquared.com/changelogs/versions/changelog/#13617 namecheap.com: https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026 vulncheck.com: https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow