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CVE PROGRAM SOURCE RECORD8.6 High

CVE-2026-4249

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

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Status
Published
Published
Updated
Assigning organization
WSO2

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

WSO2 WSO2 Universal Gateway

Default version status: unaffected

  • 4.5.0 to < 4.5.0.54affected
  • 4.6.0 to < 4.6.0.18affected
  • 4.7.0 to < 4.7.0.2affected

WSO2 WSO2 Traffic Manager

Default version status: unaffected

  • 4.5.0 to < 4.5.0.53affected
  • 4.6.0 to < 4.6.0.18affected
  • 4.7.0 to < 4.7.0.2affected

WSO2 WSO2 API Control Plane

Default version status: unaffected

  • 4.5.0 to < 4.5.0.55affected
  • 4.6.0 to < 4.6.0.19affected
  • 4.7.0 to < 4.7.0.2affected

WSO2 WSO2 API Manager

Default version status: unaffected

  • 0 to < 3.2.0unknown
  • 3.2.0 to < 3.2.0.470affected
  • 3.2.1 to < 3.2.1.89affected
  • 4.0.0 to < 4.0.0.390affected
  • 4.1.0 to < 4.1.0.254affected
  • 4.2.0 to < 4.2.0.194affected
  • 4.3.0 to < 4.3.0.105affected
  • 4.4.0 to < 4.4.0.69affected
  • 4.5.0 to < 4.5.0.54affected
  • 4.6.0 to < 4.6.0.18affected
  • 4.7.0 to < 4.7.0.2affected

References