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.

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…

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 — 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)

CWE-347 — Improper Verification of Cryptographic Signature

References

ed10eef1-636d-4fbe-9993-6890dfa878f8 (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.