CVE-2026-4249
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.
How to fix
- wso2 traffic_manager4.5.0.53, 4.6.0.18 or later
- wso2 api_control_plane4.5.0.55, 4.6.0.19 or later
- wso2 api_manager4.0.0.390, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.69, 4.5.0.54, 4.6.0.18 or later
- wso2 universal_gateway4.5.0.54, 4.6.0.18 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wso2 traffic_manager | 4.5.0 ≤ v < 4.5.0.53, 4.6.0 ≤ v < 4.6.0.18 | 4.5.0.53, 4.6.0.18 |
| wso2 api_control_plane | 4.5.0 ≤ v < 4.5.0.55, 4.6.0 ≤ v < 4.6.0.19 | 4.5.0.55, 4.6.0.19 |
| wso2 api_manager | 4.0.0 ≤ v < 4.0.0.390, 4.1.0 ≤ v < 4.1.0.254, 4.2.0 ≤ v < 4.2.0.194, 4.3.0 ≤ v < 4.3.0.105, 4.4.0 ≤ v < 4.4.0.69, 4.5.0 ≤ v < 4.5.0.54, 4.6.0 ≤ v < 4.6.0.18 | 4.0.0.390, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.69, 4.5.0.54, 4.6.0.18 |
| wso2 universal_gateway | 4.5.0 ≤ v < 4.5.0.54, 4.6.0 ≤ v < 4.6.0.18 | 4.5.0.54, 4.6.0.18 |
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