CVE-2026-41940

WebPros cPanel and WHM Authentication Bypass via Login Flow

9.3 CriticalIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

98.5%Up 82.0 points since Apr 30, 2026

What each source reports

CVE List Score used 9.3

WebPros cPanel and WHM Authentication Bypass via Login Flow

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.

Record: CVE-2026-41940
CVSS 4.0: 9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

EUVDEUVD-2026-26246 9.3

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.

Record: EUVD-2026-26246
CVSS 4.0: 9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-85qr-8rxc-62gv 9.3

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,...

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.

Record: GHSA-85qr-8rxc-62gv
CVSS 4.0: 9.3 CriticalCVSS: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
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

CISA KEV No score

WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability

WebPros cPanel & WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.

Record: CVE-2026-41940
Weakness: CWE-306
Updated: 2026-11-02

NVD 9.3

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.

Record: CVE-2026-41940
CVSS 4.0: 9.3 CriticalCVSS: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
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	cPanel/WHM CRLF Injection Authentication Bypass RCE	2026-04-28
PoC in GitHub	Sachinart/CVE-2026-41940-cpanel-0day	2026-04-29
PoC in GitHub	debugactiveprocess/cPanel-WHM-AuthBypass-Session-Checker	2026-04-29
PoC in GitHub	0xabdoulaye/CPANEL-CVE-2026-41940	2026-04-30
PoC in GitHub	Andrei-Dr/cpanel-cve-2026-41940-ioc	2026-04-30
PoC in GitHub	Kagantua/cPanelWHM-AuthBypass	2026-04-30
PoC in GitHub	Wesuiliye/CVE-2026-41940	2026-04-30
PoC in GitHub	adriyansyah-mf/cve-2026-41940-poc	2026-04-30
PoC in GitHub	assetnote/cpanel2shell-scanner	2026-04-30
PoC in GitHub	ilmndwntr/CVE-2026-41940-MASS-EXPLOIT	2026-04-30

Show 18 moreShow less

Public exploits
Source	Link	Date
PoC in GitHub	realawaisakbar/CVE-2026-41940-Exploit-PoC	2026-04-30
PoC in GitHub	rfxn/cpanel-sessionscribe	2026-04-30
PoC in GitHub	shahidmallaofficial/cpanel-cve-2026-41940-fix	2026-04-30
PoC in GitHub	zedxod/CVE-2026-41940-POC	2026-04-30
PoC in GitHub	0dev1337/cpanelscanner	2026-05-01
PoC in GitHub	0xBlackash/CVE-2026-41940	2026-05-01
PoC in GitHub	0xYuR1/CVE-2026-41940	2026-05-01
PoC in GitHub	AmirrezaMarzban/portscan-CVE-2026-41940	2026-05-01
PoC in GitHub	Jenderal92/CVE-2026-41940	2026-05-01
PoC in GitHub	MrAriaNet/cPanel-Fix	2026-05-01
PoC in GitHub	NULL200OK/cve-2026-41940-tool	2026-05-01
PoC in GitHub	XsanFlip/poc-cpanel-cve-2026-41940	2026-05-01
PoC in GitHub	george1-adel/CVE-2026-41940_exploit	2026-05-01
PoC in GitHub	kmaruthisrikar/CVE-2026-41940-cPanel-Auth-Bypass-Exploit	2026-05-01
PoC in GitHub	mahfuzreham/cpanel-cve-2026-41940	2026-05-01
PoC in GitHub	merdw/cPanel-CVE-2026-41940-Scanner	2026-05-01
Exploit-DB	cPanel - CRLF Injection	2026-05-26
Nuclei	cPanel & WHM - Authentication Bypass via Session-File CRLF Injection

Plus 49 more. The full list has every link.

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation
Nov 3, 2026	exploits, exploits_more
Nov 3, 2026	exploits
Nov 2, 2026	first indexed	CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-41940 is a critical vulnerability (CVSS 9.3) in Cpanel, published April 29, 2026. CISA lists it as known to be exploited, since April 30, 2026. EUVD reports exploitation since April 30, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 98.5%, the 99th percentile. No source names a fixed version.

References

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