Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-41940

Severity CVSS v4.0:
CRITICAL
Type:
CWE-306 Missing Authentication for Critical Function
Publication date:
29/04/2026
Last modified:
04/05/2026

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.

Impact

Vector 4.0
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 CVSS v4.0 Severity and Metrics:

Base Score: 9.30 CRITICAL
Vector: 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

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
9.30
Severity 4.0
CRITICAL
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 11.40 (including) 86.0.41 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 88.0.0 (including) 110.0.97 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 112.0.0 (including) 118.0.63 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 120.0.0 (including) 124.0.35 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 126.0.1 (including) 126.0.54 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 128.0.0 (including) 130.0.19 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 132.0.0 (including) 132.0.29 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 134.0.0 (including) 134.0.20 (excluding)
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* 136.0.0 (including) 136.0.5 (excluding)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* 11.40 (including) 86.0.41 (excluding)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* 88.0.0 (including) 110.0.97 (excluding)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* 112.0.0 (including) 118.0.63 (excluding)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* 120.0.0 (including) 124.0.35 (excluding)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* 126.0.1 (including) 126.0.54 (excluding)
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* 128.0.0 (including) 130.0.19 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools