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VULNERABILITIES

CVE-2026-5430 Details

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. 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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: WSO2 LLCCVSS-B:10 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-5430 CISA-ADPUS Government Resource
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/ WSO2 LLCVendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
WSO2 Multiple Products Path Traversal Vulnerability Sep 24, 2026Sep 27, 2026Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-347Improper Verification of Cryptographic SignatureWSO2 LLC

Affected Products

ProductVersions
wso2 api control plane
>= 4.5.0, < 4.5.0.58
>= 4.6.0, < 4.6.0.22

CPE

  • cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
wso2 api manager
>= 4.1.0, < 4.1.0.257
>= 4.2.0, < 4.2.0.197
>= 4.3.0, < 4.3.0.108
>= 4.4.0, < 4.4.0.72
>= 4.5.0, < 4.5.0.57

CPE

  • cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
wso2 traffic manager
>= 4.5.0, < 4.5.0.56
>= 4.6.0, < 4.6.0.21

CPE

  • cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
wso2 universal gateway
>= 4.5.0, < 4.5.0.57
>= 4.6.0, < 4.6.0.21

CPE

  • cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-5430
NVD Published Date:
Aug 6, 2026
NVD Last Modified:
Sep 25, 2026
Source:
WSO2 LLC
CVE-2026-5430 Details - Not Deferred