CVE-2026-4052 PUBLISHED

Privilege Escalation via Token Endpoint in WSO2 API Manager (APIM 4.x/IS as Resident Key Manager)

Assigner: WSO2
Reserved: 12.03.2026 Published: 03.11.2026 Updated: 03.11.2026

This issue only impacts deployments where WSO2 Identity Server is configured as a Resident Key Manager with database sharing. In such environments, a self-registered user may gain access to the System REST APIs of WSO2 API Manager by obtaining a token from the WSO2 Identity Server token endpoint.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Product Status

Vendor WSO2
Product WSO2 API Manager
Versions Default: unaffected
  • Version 4.1.0 is affected
  • Version 4.2.0 is affected
  • Version 4.3.0 is affected
  • Version 4.4.0 is affected
  • Version 4.5.0 is affected
  • Version 4.6.0 is affected
Vendor WSO2
Product WSO2 API Control Plane
Versions Default: unaffected
  • Version 4.5.0 is affected
  • Version 4.6.0 is affected
Vendor WSO2
Product WSO2 Identity Server Key Manager Connector (apim-km-wso2is)
Versions Default: unaffected
  • affected from 0 to 1.8.8 (excl.)

Solutions

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5212/#solution

References

Problem Types

  • CWE-862: Missing Authorization CWE

Impacts

  • CAPEC-58: Restful Privilege Elevation
  • CAPEC-233: Privilege Escalation