Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-5430

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
06/08/2026
Last modified:
10/08/2026

Description

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.<br /> <br /> 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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 10.00 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
10.00
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:* 4.5.0 (including) 4.5.0.58 (excluding)
cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:* 4.6.0 (including) 4.6.0.22 (excluding)
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* 4.1.0 (including) 4.1.0.257 (excluding)
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* 4.2.0 (including) 4.2.0.197 (excluding)
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* 4.3.0 (including) 4.3.0.108 (excluding)
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* 4.4.0 (including) 4.4.0.72 (excluding)
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* 4.5.0 (including) 4.5.0.57 (excluding)
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* 4.6.0 (including) 4.6.0.21 (excluding)
cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:* 4.5.0 (including) 4.5.0.56 (excluding)
cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:* 4.6.0 (including) 4.6.0.21 (excluding)
cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:* 4.5.0 (including) 4.5.0.57 (excluding)
cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:* 4.6.0 (including) 4.6.0.21 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools