CVE-2026-41940

CRITICAL CISA KEV

Published Apr 29, 2026 Modified May 4, 2026 CWE-306

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.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.9053

Probability of exploitation

1.00%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Apr 30, 2026 Remediation due: May 3, 2026 Known ransomware use

Weakness Type (CWE)

CWE-306 Missing Authentication

Affected Products

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.8 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2026-41940? +

CVE-2026-41940 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.9053, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-41940? +

CVE-2026-41940 affects products from cpanel, specifically: cpanel, whm, wp_squared. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41940? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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