AUGUST 25, 2026
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Case File

CVE-2026-4249

HIGH · CVSS 8.6 EPSS 0.34% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-06 · Last synced 2026-08-05

CyberRota Analysis

AI-Generated

Multiple WSO2 products are vulnerable due to inadequate validation of user-supplied JSON payloads in their throttling event handling mechanism. This flaw allows unauthenticated remote attackers to inject malicious JSON, resulting in a persistent denial of service that disrupts API Gateway functionality and necessitates manual intervention for recovery. Organizations utilizing WSO2 products should prioritize addressing this vulnerability to maintain service availability and prevent operational disruptions.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-4249
Severity
HIGH
CVSS
8.6
EPSS
0.34%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)