Arbitrary file upload in Wso2 API Control Plane
CVE-2026-3418
The System REST API accepts user-supplied file uploads without enforcing sufficient validation on the file type or destination, allowing files to be written to arbitrary server-accessible locations. Exploitation requires authenticated administrative access with publisher privileges. Successful exploitation permits an authenticated publisher to upload files to server-accessible locations. Depending on the deployment environment and how uploaded files are handled, this could lead to the execution of uploaded content, potentially resulting in remote code execution.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Wso2 API Control Plane — versions 4.5.0, 4.6.0
- Wso2 API Manager — versions 4.4.0, 4.5.0, 4.6.0
- Wso2 API Manager Publisher Rest V4 — versions 9.30.67, 9.31.86, 9.32.147
- Wso2 Carbon API Management — versions 9.30.67, 9.33.104
- Wso2 Carbon API Management Implementation — versions 9.30.67, 9.31.86, 9.32.147
- Wso2 Traffic Manager — versions 4.5.0, 4.6.0
- Wso2 Universal Gateway — versions 4.5.0, 4.6.0
Weakness classification (CWE)
References
- ed10eef1-636d-4fbe-9993-6890dfa878f8 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-3418?
- CVE-2026-3418 is a critical-severity vulnerability in Wso2 API Control Plane, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.1/10. Published 2026-08-06.
- How severe is CVE-2026-3418?
- Critical severity. CVSS v3 base score is 9.1 out of 10.