high8.6
CVE-2026-4249
The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and cont…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Wso2 | Api Control Plane | from 4.5.0 before 4.5.0.55 from 4.6.0 before 4.6.0.19 |
| Wso2 | Api Manager | from 4.0.0 before 4.0.0.390 from 4.1.0 before 4.1.0.254 from 4.2.0 before 4.2.0.194 from 4.3.0 before 4.3.0.105 from 4.4.0 before 4.4.0.69 from 4.5.0 before 4.5.0.54 |
| Wso2 | Traffic Manager | from 4.5.0 before 4.5.0.53 from 4.6.0 before 4.6.0.18 |
| Wso2 | Universal Gateway | from 4.5.0 before 4.5.0.54 from 4.6.0 before 4.6.0.18 |