8.6High
CVE-2026-4249Denial of Service via Malicious JSON Payloads in Throttling Events in Multiple WSO2 Products Causing Persistent Service Disruption
Description
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.
Weakness (CWE):
CWE-707
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| wso2 | api control plane | 4.5.0 – < 4.5.0.55 | |
| wso2 | api manager | 4.0.0 – < 4.0.0.390 | |
| wso2 | traffic manager | 4.5.0 – < 4.5.0.53 | |
| wso2 | universal gateway | 4.5.0 – < 4.5.0.54 | |
| WSO2 | WSO2 API Control Plane | 4.5.0 – < 4.5.0.55, 4.6.0 – < 4.6.0.19, 4.7.0 – < 4.7.0.2 | |
| WSO2 | WSO2 API Manager | 3.2.0 – < 3.2.0.470, 3.2.1 – < 3.2.1.89, 4.0.0 – < 4.0.0.390, 4.1.0 – < 4.1.0.254, 4.2.0 – < 4.2.0.194, 4.3.0 – < 4.3.0.105, 4.4.0 – < 4.4.0.69, 4.5.0 – < 4.5.0.54, 4.6.0 – < 4.6.0.18, 4.7.0 – < 4.7.0.2 | |
| WSO2 | WSO2 Traffic Manager | 4.5.0 – < 4.5.0.53, 4.6.0 – < 4.6.0.18, 4.7.0 – < 4.7.0.2 | |
| WSO2 | WSO2 Universal Gateway | 4.5.0 – < 4.5.0.54, 4.6.0 – < 4.6.0.18, 4.7.0 – < 4.7.0.2 |
References and patches
- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236/ vendor-advisoryVendor Advisory
CPE matches (NVD) (13)
cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.55cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.19cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.0.0 < 4.0.0.390cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.1.0 < 4.1.0.254cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.2.0 < 4.2.0.194cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.3.0 < 4.3.0.105cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.4.0 < 4.4.0.69cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.54cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.18cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.53cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.18cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.54cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.18