CVE-2026-4249

HIGH

Denial of Service via Malicious JSON Payloads in Throttling Events in Multiple WSO2 Products Causing Persistent Service Disruption

Title source: cna
STIX 2.1

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.

References (1)

Core 1

Scores

CVSS v3 8.6
EPSS 0.0034
EPSS Percentile 26.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-707
Status published
Products (24)
wso2/api_control_plane 4.5.0 - 4.5.0.55
wso2/api_manager 4.0.0 - 4.0.0.390
wso2/traffic_manager 4.5.0 - 4.5.0.53
wso2/universal_gateway 4.5.0 - 4.5.0.54
WSO2/WSO2 API Control Plane 4.5.0 - 4.5.0.55
WSO2/WSO2 API Control Plane 4.6.0 - 4.6.0.19
WSO2/WSO2 API Control Plane 4.7.0 - 4.7.0.2
WSO2/WSO2 API Manager < 3.2.0
WSO2/WSO2 API Manager 3.2.0 - 3.2.0.470
WSO2/WSO2 API Manager 3.2.1 - 3.2.1.89
... and 14 more
Published Jul 06, 2026
Tracked Since Jul 06, 2026