Answer in brief
CVE-2026-4249 records a High severity (CVSS 8.6) vulnerability in Denial of Service via Malicious JSON Payloads in Throttling Events in Multiple WSO2 Products Causing Persistent Service Disruption. The current sources do not mark it as known exploited. The current feed maps WSO2/WSO2 API Control Plane (generic), WSO2/WSO2 API Manager (generic), WSO2/WSO2 Traffic Manager (generic), WSO2/WSO2 Universal Gateway (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps WSO2/WSO2 API Control Plane (generic), WSO2/WSO2 API Manager (generic), WSO2/WSO2 Traffic Manager (generic), WSO2/WSO2 Universal Gateway (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| WSO2/WSO2 API Control Planegeneric | >=4.5.0 <4.5.0.55 || >=4.6.0 <4.6.0.19 || >=4.7.0 <4.7.0.2 | 4.5.0.55, 4.6.0.19, 4.7.0.2 |
| WSO2/WSO2 API Managergeneric | >=3.2.0 <3.2.0.470 || >=3.2.1 <3.2.1.89 || >=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 || >=4.7.0 <4.7.0.2 | 3.2.0.470, 3.2.1.89, 4.0.0.390, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.69, 4.5.0.54, 4.6.0.18, 4.7.0.2 |
| WSO2/WSO2 Traffic Managergeneric | >=4.5.0 <4.5.0.53 || >=4.6.0 <4.6.0.18 || >=4.7.0 <4.7.0.2 | 4.5.0.53, 4.6.0.18, 4.7.0.2 |
| WSO2/WSO2 Universal Gatewaygeneric | >=4.5.0 <4.5.0.54 || >=4.6.0 <4.6.0.18 || >=4.7.0 <4.7.0.2 | 4.5.0.54, 4.6.0.18, 4.7.0.2 |
Published upstream
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.