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Vulnerabilities / CVE-2026-41940

CVE-2026-41940

Published 2026-04-29 · published (not yet in NVD)

CVE-2026-41940

WebPros cPanel and WHM Authentication Bypass via Login Flow

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-04-30, with a fix-by date of 2026-05-03. Patch it first.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

9.3 CRITICAL
CVSS 4.0 · CNA
99%
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)

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.

Scores

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCNA
9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCNA

Affected products

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

Weakness: CWE-306

5 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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