CVE-2026-41940
Last modified
CVE-2026-41940 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 98.10% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cpanel | Cpanel | >= 11.40, < 86.0.41 |
| Cpanel | Cpanel | >= 88.0.0, < 110.0.97 |
| Cpanel | Cpanel | >= 112.0.0, < 118.0.63 |
| Cpanel | Cpanel | >= 120.0.0, < 124.0.35 |
| Cpanel | Cpanel | >= 126.0.1, < 126.0.54 |
| Cpanel | Cpanel | >= 128.0.0, < 130.0.19 |
| Cpanel | Cpanel | >= 132.0.0, < 132.0.29 |
| Cpanel | Cpanel | >= 134.0.0, < 134.0.20 |
| Cpanel | Cpanel | >= 136.0.0, < 136.0.5 |
| Cpanel | Whm | >= 11.40, < 86.0.41 |
| Cpanel | Whm | >= 88.0.0, < 110.0.97 |
| Cpanel | Whm | >= 112.0.0, < 118.0.63 |
| Cpanel | Whm | >= 120.0.0, < 124.0.35 |
| Cpanel | Whm | >= 126.0.1, < 126.0.54 |
| Cpanel | Whm | >= 128.0.0, < 130.0.19 |
| Cpanel | Whm | >= 132.0.0, < 132.0.29 |
| Cpanel | Whm | >= 134.0.0, < 134.0.20 |
| Cpanel | Whm | >= 136.0.0, < 136.0.5 |
| Cpanel | Wp Squared | < 136.1.7 |
References
- https://docs.cpanel.net/release-notes/release-notesRelease Notes
- https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.pyExploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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