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    CVE-2026-4249

    The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and content. This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of service condition. Successful exploitation of this vulnerability can disrupt the API Gateway, preventing legitimate API traffic from being processed and impacting complete service availability. The denial of service is persistent, requiring manual intervention to restore normal operations.

    Published:Jul 6, 2026
    Last Modified:Jul 6, 2026
    EPS:Jul 6, 2026
    EPSS Score:
    CVSS Score:8.6

    Affected Products

    Vendor
    Wso2
    Product
    Wso2 Api Control Plane
    Vendor
    Wso2
    Product
    Wso2 Api Manager
    Vendor
    Wso2
    Product
    Wso2 Traffic Manager
    Vendor
    Wso2
    Product
    Wso2 Universal Gateway

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-707 Improper Neutralization

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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