Vulnerability in Wso2 API Control Plane
CVE-2026-5430
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.
EPSS: 0.003 (25.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Wso2 Api_control_plane
- Wso2 Api_manager
- Wso2 Traffic_manager
- Wso2 Universal_gateway
- Wso2 Api Control Plane — versions 4.5.0, 4.6.0
- Wso2 Api Manager — versions 0, 4.1.0, 4.2.0
- Wso2 Carbon Api Manager Rest Utility — versions 9.20.74, 9.28.116, 9.29.120
- Wso2 Traffic Manager — versions 4.5.0, 4.6.0
- Wso2 Universal Gateway — versions 4.5.0, 4.6.0
Weakness classification (CWE)
References
- ed10eef1-636d-4fbe-9993-6890dfa878f8 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-5430?
- CVE-2026-5430 is a critical-severity vulnerability in Wso2 API Control Plane, classified under Improper Verification of Cryptographic Signature. CVSS score: 10.0/10. Published 2026-08-06.
- How severe is CVE-2026-5430?
- Critical severity. CVSS v3 base score is 10.0 out of 10.