# CVE-2026-41940

## Summary

- **CVE ID:** CVE-2026-41940
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-306
- **Published:** Apr 29, 2026
- **Last Modified:** Aug 11, 2026

## Description

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.

## Affected Products

- cPanel, L.L.C. — cPanel & WHM (11.110.0)
- cPanel, L.L.C. — cPanel & WHM (11.118.0)
- cPanel, L.L.C. — cPanel & WHM (11.126.0)
- cPanel, L.L.C. — cPanel & WHM (11.132.0)
- cPanel, L.L.C. — cPanel & WHM (11.134.0)
- cPanel, L.L.C. — cPanel & WHM (11.136.0)
- cPanel, L.L.C. — WP Squared (11.136.1)
- cPanel — cPanel (11.110.0)
- cPanel — cPanel (11.118.0)
- cPanel — cPanel (11.126.0)
- cPanel — cPanel (11.132.0)
- cPanel — cPanel (11.134.0)
- cPanel — cPanel (11.136.0)
- cPanel — WP Squared (11.136.1)
- cPanel — WHM (11.110.0)
- cPanel — WHM (11.118.0)
- cPanel — WHM (11.126.0)
- cPanel — WHM (11.132.0)
- cPanel — WHM (11.134.0)
- cPanel — WHM (11.136.0)
- cPanel — cPanel (11.86.0)
- cPanel — cPanel (11.130.0)
- cPanel — WHM (11.86.0)
- cPanel — WHM (11.130.0)
- cPanel — WP Squared (136.1.0)
- cPanel — cPanel (11.40.0.0)
- cPanel — cPanel (11.88.0.0)
- cPanel — cPanel (11.112.0.0)
- cPanel — cPanel (11.120.0.0)
- cPanel — cPanel (11.128.0.0)
- cPanel — cPanel (11.132.0.0)
- cPanel — cPanel (11.134.0.0)
- cPanel — cPanel (11.136.0.0)
- cPanel — WP Squared (11.136.1.7)
- cPanel — WHM (11.40.0.0)
- cPanel — WHM (11.88.0.0)
- cPanel — WHM (11.112.0.0)
- cPanel — WHM (11.120.0.0)
- cPanel — WHM (11.128.0.0)
- cPanel — WHM (11.132.0.0)
- cPanel — WHM (11.134.0.0)
- cPanel — WHM (11.136.0.0)
- WebPros — cPanel (11.40.0.0)
- WebPros — cPanel (11.88.0.0)
- WebPros — cPanel (11.112.0.0)
- WebPros — cPanel (11.120.0.0)
- WebPros — cPanel (11.128.0.0)
- WebPros — cPanel (11.132.0.0)
- WebPros — cPanel (11.134.0.0)
- WebPros — cPanel (11.136.0.0)
- WebPros — WP Squared (11.136.1.7)
- WebPros — WHM (11.40.0.0)
- WebPros — WHM (11.88.0.0)
- WebPros — WHM (11.112.0.0)
- WebPros — WHM (11.120.0.0)
- WebPros — WHM (11.128.0.0)
- WebPros — WHM (11.132.0.0)
- WebPros — WHM (11.134.0.0)
- WebPros — WHM (11.136.0.0)
- WebPros — cPanel (11.125.0.0)
- WebPros — WHM (11.125.0.0)
- WebPros — cPanel (11.96.0.0)
- WebPros — cPanel (11.104.0.0)
- WebPros — cPanel (11.126.0.0)
- WebPros — WHM (11.96.0.0)
- WebPros — WHM (11.104.0.0)
- WebPros — WHM (11.126.0.0)

## References

- [CNA](https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026)
- [CNA](https://docs.cpanel.net/release-notes/release-notes)
- [CNA](https://docs.wpsquared.com/changelogs/versions/changelog/#13617)
- [CNA](https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026)
- [CNA](https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow)
- [CISA-ADP](https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940)
- [CVE](https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/)
- [CVE](https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 98.53%
- **EPSS Percentile:** 99.9

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Apr 30, 2026
- **Due Date:** May 3, 2026

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._