CVE-2026-4249: high-severity vulnerability in WSO2 API Control Plane
Denial of Service via Malicious JSON Payloads in Throttling Events in Multiple WSO2 Products Causing Persistent Service Disruption
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.6%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Affected products
WSO2 · WSO2 API Control PlaneWSO2 · WSO2 API ManagerWSO2 · WSO2 Traffic ManagerWSO2 · WSO2 Universal GatewayRelated CVEs — WSO2 API Control Plane
In the same product, most dangerous first.
CVE-2026-5430CRITICALAuthentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account TakeoverEPSS 22.4%KEVCVE-2024-7074MEDIUMAuthenticated Arbitrary File Upload in Multiple WSO2 Products via SOAP Admin Service Leading to Remote Code ExecutionEPSS 17.7%CVE-2025-2905CRITICALAn XML External Entity (XXE) vulnerability in Multiple WSO2 ProductsEPSS 1.3%CVE-2025-3125MEDIUMAuthenticated Arbitrary File Upload in Multiple WSO2 Products via CarbonAppUploader Admin Service Leading to Remote Code ExecutionEPSS 0.9%CVE-2025-5605MEDIUMAuthentication Bypass via URI Manipulation in Multiple WSO2 Products' Management Console Leading to Partial Information DisclosureEPSS 0.9%CVE-2025-10611CRITICALPotential Broken Access Control in Multiple WSO2 Products via System REST APIsEPSS 0.8%