CVE-2026-4249 Details
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.
A denial-of-service vulnerability has been identified in multiple WSO2 products, including WSO2 API Control Plane, API Manager, Traffic Manager, and Universal Gateway, all in versions 4.5.0 and 4.6.0. The issue arises because the throttling event handling mechanism accepts user-supplied JSON payloads without adequate validation. This flaw enables an unauthenticated remote attacker to inject malicious JSON data, creating a persistent denial-of-service condition. Exploitation of this vulnerability disrupts the API Gateway, causing legitimate API traffic to be blocked and requiring manual intervention to restore normal service.
Users of WSO2 API Control Plane, API Manager, Traffic Manager, and Universal Gateway can apply the relevant public fixes available on GitHub. For those with a WSO2 Support Subscription, the latest unaffected version can be downloaded via WSO2 Updates.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236/ | WSO2 LLC | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-707 | Improper Neutralization | WSO2 LLC |
Affected Products
| Product | Versions |
|---|---|
| wso2 api control plane | >= 4.5.0, < 4.5.0.55 >= 4.6.0, < 4.6.0.19 |
CPE
Remediation
| |
| wso2 api manager | >= 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 |
CPE
Remediation
| |
| wso2 traffic manager | >= 4.5.0, < 4.5.0.53 >= 4.6.0, < 4.6.0.18 |
CPE
Remediation
| |
| wso2 universal gateway | >= 4.5.0, < 4.5.0.54 >= 4.6.0, < 4.6.0.18 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 9, 2026 | Initial Analysis | [email protected] |
| Jul 6, 2026 | CVE Modified | CISA-ADP |
| Jul 6, 2026 | New CVE Received | WSO2 LLC |