Auth bypass in Wso2 API Control Plane
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Wso2 API Control Plane — versions 4.5.0, 4.6.0
- Wso2 API Manager — versions 4.1.0, 4.2.0, 4.3.0
- Wso2 Identity Server Key Manager Connector (Apim-Km-Wso2is)
Weakness classification (CWE)
References
- ed10eef1-636d-4fbe-9993-6890dfa878f8 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-4052?
- CVE-2026-4052 is a critical-severity vulnerability in Wso2 API Control Plane, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-11-03.
- How severe is CVE-2026-4052?
- Critical severity. CVSS v3 base score is 9.8 out of 10.