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    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.

    Published:Aug 6, 2026
    Last Modified:Aug 6, 2026
    EPS:Aug 6, 2026
    EPSS Score:0.00223
    CVSS Score:10

    Affected Products

    Vendor
    Wso2
    Product
    Wso2 Api Control Plane
    Vendor
    Wso2
    Product
    Wso2 Api Manager
    Vendor
    Wso2
    Product
    Wso2 Carbon Api Manager Rest Api Utility
    Vendor
    Wso2
    Product
    Wso2 Traffic Manager
    Vendor
    Wso2
    Product
    Wso2 Universal Gateway

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High