CVE-2026-4052
Privilege Escalation via Token Endpoint in WSO2 API Manager (APIM 4.x/IS as Resident Key Manager)
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.
Fixes and workarounds
Fix
Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5212/#solution
Source: CNA: WSO2Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| WSO2 API Manager WSO2 |
4.1.0 (affected, custom) 4.2.0 (affected, custom) 4.3.0 (affected, custom) 4.4.0 (affected, custom) 4.5.0 (affected, custom) 4.6.0 (affected, custom) Other versions: unaffected |
CNA: WSO2 |
| WSO2 API Control Plane WSO2 |
4.5.0 (affected, custom) 4.6.0 (affected, custom) Other versions: unaffected |
CNA: WSO2 |
| WSO2 Identity Server Key Manager Connector (apim-km-wso2is) WSO2 org.wso2.km.ext.wso2is:wso2is.key.manager.core
|
≥ 0; < 1.8.8 (affected, custom)
Other versions: unaffected |
CNA: WSO2 |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 9.8 critical |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA: WSO2 |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5212/CNA: WSO2 · vendor-advisory
For agents and automation
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