CVE-2026-4249

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.

CVSS v3 8.6 HIGH

8.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:wso2:api_control_plane::::::::
	cpe:2.3:a:wso2:api_control_plane::::::::

Configuration 2 (hide)

OR	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::

Configuration 3 (hide)

OR	cpe:2.3:a:wso2:traffic_manager::::::::
	cpe:2.3:a:wso2:traffic_manager::::::::

Configuration 4 (hide)

OR	cpe:2.3:a:wso2:universal_gateway::::::::
	cpe:2.3:a:wso2:universal_gateway::::::::

History

No history.

Information

Published : 2026-07-06 11:16

Updated : 2026-07-09 13:04

NVD link : CVE-2026-4249

Mitre link : CVE-2026-4249

CVE.ORG link : CVE-2026-4249

JSON object : View

Products Affected

wso2

api_control_plane
traffic_manager
api_manager
universal_gateway

CWE

CWE-707

Improper Neutralization

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This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of service condition.\n\nSuccessful exploitation of this vulnerability can disrupt the API Gateway, preventing legitimate API traffic from being processed and impacting complete service availability. 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