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.

CVSS v3 10.0 CRITICAL

10.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:wso2:api_control_plane::::::::
	cpe:2.3:a:wso2:api_control_plane::::::::

Configuration 2 (hide)

OR	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::

Configuration 3 (hide)

OR	cpe:2.3:a:wso2:traffic_manager::::::::
	cpe:2.3:a:wso2:traffic_manager::::::::

Configuration 4 (hide)

OR	cpe:2.3:a:wso2:universal_gateway::::::::
	cpe:2.3:a:wso2:universal_gateway::::::::

History

No history.

Information

Published : 2026-08-06 08:16

Updated : 2026-08-10 12:35

NVD link : CVE-2026-5430

Mitre link : CVE-2026-5430

CVE.ORG link : CVE-2026-5430

JSON object : View

Products Affected

wso2

api_control_plane
traffic_manager
api_manager
universal_gateway

CWE

CWE-347

Improper Verification of Cryptographic Signature

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