Critical · published April 29, 2026
CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.
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.
| Product | Versions | Fixed in |
|---|---|---|
| cpanel/cpanel | ≥ 11.40, < 86.0.41 | 86.0.41 |
| cpanel/cpanel | ≥ 88.0.0, < 110.0.97 | 110.0.97 |
| cpanel/cpanel | ≥ 112.0.0, < 118.0.63 | 118.0.63 |
| cpanel/cpanel | ≥ 120.0.0, < 124.0.35 | 124.0.35 |
| cpanel/cpanel | ≥ 126.0.1, < 126.0.54 | 126.0.54 |
| cpanel/cpanel | ≥ 128.0.0, < 130.0.19 | 130.0.19 |
| cpanel/cpanel | ≥ 132.0.0, < 132.0.29 | 132.0.29 |
| cpanel/cpanel | ≥ 134.0.0, < 134.0.20 | 134.0.20 |
| cpanel/cpanel | ≥ 136.0.0, < 136.0.5 | 136.0.5 |
| cpanel/whm | ≥ 11.40, < 86.0.41 | 86.0.41 |
| cpanel/whm | ≥ 88.0.0, < 110.0.97 | 110.0.97 |
| cpanel/whm | ≥ 112.0.0, < 118.0.63 | 118.0.63 |
| cpanel/whm | ≥ 120.0.0, < 124.0.35 | 124.0.35 |
| cpanel/whm | ≥ 126.0.1, < 126.0.54 | 126.0.54 |
| cpanel/whm | ≥ 128.0.0, < 130.0.19 | 130.0.19 |
| cpanel/whm | ≥ 132.0.0, < 132.0.29 | 132.0.29 |
| cpanel/whm | ≥ 134.0.0, < 134.0.20 | 134.0.20 |
| cpanel/whm | ≥ 136.0.0, < 136.0.5 | 136.0.5 |
| cpanel/wp_squared | < 136.1.7 | 136.1.7 |