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.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.6, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 4 products from wso2, from wso2, from wso2 and 1 other, organizations running these solutions should prioritize assessment and patching.
Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2026-07-06T11:16:30.433
2026-07-09T13:04:57.540
Analyzed
ed10eef1-636d-4fbe-9993-6890dfa878f8
CVSSv3.1: 8.6 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | wso2 | api_control_plane | < 4.5.0.55 | Yes |
| Application | wso2 | api_control_plane | < 4.6.0.19 | Yes |
| Application | wso2 | api_manager | < 4.0.0.390 | Yes |
| Application | wso2 | api_manager | < 4.1.0.254 | Yes |
| Application | wso2 | api_manager | < 4.2.0.194 | Yes |
| Application | wso2 | api_manager | < 4.3.0.105 | Yes |
| Application | wso2 | api_manager | < 4.4.0.69 | Yes |
| Application | wso2 | api_manager | < 4.5.0.54 | Yes |
| Application | wso2 | api_manager | < 4.6.0.18 | Yes |
| Application | wso2 | traffic_manager | < 4.5.0.53 | Yes |
| Application | wso2 | traffic_manager | < 4.6.0.18 | Yes |
| Application | wso2 | universal_gateway | < 4.5.0.54 | Yes |
| Application | wso2 | universal_gateway | < 4.6.0.18 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For wso2's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.