Critical · published August 6, 2026
CVSS calls it critical at 10.0. It is confirmed in active exploitation. It sits in the 47.4th percentile for exploit probability.
The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access.
Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.
| Product | Versions | Fixed in |
|---|---|---|
| wso2/api_control_plane | ≥ 4.5.0, < 4.5.0.58 | 4.5.0.58 |
| wso2/api_control_plane | ≥ 4.6.0, < 4.6.0.22 | 4.6.0.22 |
| wso2/api_manager | ≥ 4.1.0, < 4.1.0.257 | 4.1.0.257 |
| wso2/api_manager | ≥ 4.2.0, < 4.2.0.197 | 4.2.0.197 |
| wso2/api_manager | ≥ 4.3.0, < 4.3.0.108 | 4.3.0.108 |
| wso2/api_manager | ≥ 4.4.0, < 4.4.0.72 | 4.4.0.72 |
| wso2/api_manager | ≥ 4.5.0, < 4.5.0.57 | 4.5.0.57 |
| wso2/api_manager | ≥ 4.6.0, < 4.6.0.21 | 4.6.0.21 |
| wso2/traffic_manager | ≥ 4.5.0, < 4.5.0.56 | 4.5.0.56 |
| wso2/traffic_manager | ≥ 4.6.0, < 4.6.0.21 | 4.6.0.21 |
| wso2/universal_gateway | ≥ 4.5.0, < 4.5.0.57 | 4.5.0.57 |
| wso2/universal_gateway | ≥ 4.6.0, < 4.6.0.21 | 4.6.0.21 |