CVSS 10.0 (critical) · listed as exploited by CISA since 2026-09-24 · published 2026-08-06
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.
Affected products (NVD): wso2 api_control_plane, wso2 api_manager, wso2 traffic_manager, wso2 universal_gateway
Fixed in (NVD): 4.5.0.58, 4.6.0.22, 4.1.0.257, 4.2.0.197, 4.3.0.108, 4.4.0.72, 4.5.0.57, 4.6.0.21, 4.5.0.56
Weakness: CWE-347
Source: NVD CVE-2026-5430
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