# CVE-2026-4249

## Summary

- **CVE ID:** CVE-2026-4249
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
- **CWE:** CWE-707
- **Published:** Jul 6, 2026
- **Last Modified:** Jul 6, 2026

## 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.

## Affected Products

- WSO2 — WSO2 Universal Gateway (4.5.0)
- WSO2 — WSO2 Universal Gateway (4.6.0)
- WSO2 — WSO2 Universal Gateway (4.7.0)
- WSO2 — WSO2 Traffic Manager (4.5.0)
- WSO2 — WSO2 Traffic Manager (4.6.0)
- WSO2 — WSO2 Traffic Manager (4.7.0)
- WSO2 — WSO2 API Control Plane (4.5.0)
- WSO2 — WSO2 API Control Plane (4.6.0)
- WSO2 — WSO2 API Control Plane (4.7.0)
- WSO2 — WSO2 API Manager (0)
- WSO2 — WSO2 API Manager (3.2.0)
- WSO2 — WSO2 API Manager (3.2.1)
- WSO2 — WSO2 API Manager (4.0.0)
- WSO2 — WSO2 API Manager (4.1.0)
- WSO2 — WSO2 API Manager (4.2.0)
- WSO2 — WSO2 API Manager (4.3.0)
- WSO2 — WSO2 API Manager (4.4.0)
- WSO2 — WSO2 API Manager (4.5.0)
- WSO2 — WSO2 API Manager (4.6.0)
- WSO2 — WSO2 API Manager (4.7.0)

## References

- [CNA](https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.56%
- **EPSS Percentile:** 44.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._