Vulnerability Intelligence Report
Privilege Escalation via Token Endpoint in WSO2 API Manager (APIM 4.x/IS as Resident Key Manager)
CVE-2026-4052
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.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:0.36%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-862 ↗CWE-862: Missing Authorization
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| WSO2 | WSO2 API Manager | 4.1.0 (affected), 4.2.0 (affected), 4.3.0 (affected), 4.4.0 (affected), 4.5.0 (affected), 4.6.0 (affected) |
| WSO2 | WSO2 API Control Plane | 4.5.0 (affected), 4.6.0 (affected) |
| WSO2 | WSO2 Identity Server Key Manager Connector (apim-km-wso2is) | 0 < 1.8.8 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.360%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | WSO2 LLC · Vendor · USA |
| Reserved | 2026-03-12T15:04:40 |
| Published | 2026-11-03T08:02:33 |
| Last Updated | 2026-11-03T20:08:17 |
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