# CVE-2026-41940

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.

- Page: https://www.vulneraibility.com/cve/CVE-2026-41940
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2026-04-30; CISA due date 2026-05-03; known ransomware use
- EPSS: 98.53%
- Public exploit code: 1 on Exploit-DB · 1 Metasploit module · 74 GitHub proofs of concept · 1 Nuclei template (first 2026-04-29)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2026-04-29)
- Weakness: CWE-306
- Published: 2026-04-29

## Affected versions

- WebPros cPanel: affected >= 11.40.0.0 and < 11.86.0.41; >= 11.88.0.0 and < 11.94.0.28; >= 11.96.0.0 and < 11.102.0.39; >= 11.104.0.0 and < 11.110.0.97; >= 11.112.0.0 and < 11.118.0.63; >= 11.120.0.0 and < 11.124.0.35; >= 11.126.0.0 and < 11.126.0.54; >= 11.128.0.0 and < 11.130.0.19; >= 11.132.0.0 and < 11.132.0.29; >= 11.134.0.0 and < 11.134.0.20; >= 11.136.0.0 and < 11.136.0.5
- WebPros WHM: affected >= 11.40.0.0 and < 11.86.0.41; >= 11.88.0.0 and < 11.94.0.28; >= 11.96.0.0 and < 11.102.0.39; >= 11.104.0.0 and < 11.110.0.97; >= 11.112.0.0 and < 11.118.0.63; >= 11.120.0.0 and < 11.124.0.35; >= 11.126.0.0 and < 11.126.0.54; >= 11.128.0.0 and < 11.130.0.19; >= 11.132.0.0 and < 11.132.0.29; >= 11.134.0.0 and < 11.134.0.20; >= 11.136.0.0 and < 11.136.0.5
- WebPros WP Squared: affected < 11.136.1.7

A version outside these ranges is not a statement that it is unaffected.

## References

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

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.