Vulnerability · Published Aug 6, 2026 · Assigned by WSO2
CVE-2026-3418Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
Critical 9.1
In plain English
A critical-severity unrestricted file upload in WSO2 API Control Plane from WSO2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 55% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WSO2 | WSO2 API Manager | 4.4.0 – before 4.4.0.674.5.0 – before 4.5.0.524.6.0 – before 4.6.0.16 |
| WSO2 | WSO2 Traffic Manager | 4.5.0 – before 4.5.0.514.6.0 – before 4.6.0.16 |
| WSO2 | WSO2 API Control Plane | 4.5.0 – before 4.5.0.534.6.0 – before 4.6.0.17 |
| WSO2 | WSO2 Universal Gateway | 4.5.0 – before 4.5.0.524.6.0 – before 4.6.0.16 |
| WSO2 | WSO2 Carbon API Management Implementation | 9.30.67 – before 9.30.67.1569.31.86 – before 9.31.86.1419.32.147 – before 9.32.147.44 |
| WSO2 | WSO2 API Manager Publisher REST API V4 | 9.30.67 – before 9.30.67.1569.31.86 – before 9.31.86.1419.32.147 – before 9.32.147.44 |
| WSO2 | WSO2 Carbon API Management API | 9.30.67 – before 9.30.67.156 |
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H