Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution

Summary

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.

Timeline

1. Aug 6, 2026, 5:32 PM UTCCVE published
2. Aug 7, 2026, 5:46 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Sep 23, 2026, 3:30 PM UTCRecord last updated

Affected versions

• WSO2 WSO2 API Manager

  From 4.4.0 · fixed in 4.4.0.67; From 4.5.0 · fixed in 4.5.0.52; From 4.6.0 · fixed in 4.6.0.16

• WSO2 WSO2 Traffic Manager

  From 4.5.0 · fixed in 4.5.0.51; From 4.6.0 · fixed in 4.6.0.16

• WSO2 WSO2 API Control Plane

  From 4.5.0 · fixed in 4.5.0.53; From 4.6.0 · fixed in 4.6.0.17

• WSO2 WSO2 Universal Gateway

  From 4.5.0 · fixed in 4.5.0.52; From 4.6.0 · fixed in 4.6.0.16

• org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.impl

  From 9.30.67 · fixed in 9.30.67.156; From 9.31.86 · fixed in 9.31.86.141; From 9.32.147 · fixed in 9.32.147.44

• org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.rest.api.publisher.v1.common

  From 9.30.67 · fixed in 9.30.67.156; From 9.31.86 · fixed in 9.31.86.141; From 9.32.147 · fixed in 9.32.147.44

• org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.api

  From 9.30.67 · fixed in 9.30.67.156

References 1