CVE-2026-3418 PUBLISHED

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

Assigner: WSO2
Reserved: 01.03.2026 Published: 06.08.2026 Updated: 06.08.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 9.1

Product Status

Vendor WSO2
Product WSO2 API Manager
Versions Default: unaffected
  • affected from 4.4.0 to 4.4.0.67 (excl.)
  • affected from 4.5.0 to 4.5.0.52 (excl.)
  • affected from 4.6.0 to 4.6.0.16 (excl.)
Vendor WSO2
Product WSO2 Traffic Manager
Versions Default: unaffected
  • affected from 4.5.0 to 4.5.0.51 (excl.)
  • affected from 4.6.0 to 4.6.0.16 (excl.)
Vendor WSO2
Product WSO2 API Control Plane
Versions Default: unaffected
  • affected from 4.5.0 to 4.5.0.53 (excl.)
  • affected from 4.6.0 to 4.6.0.17 (excl.)
Vendor WSO2
Product WSO2 Universal Gateway
Versions Default: unaffected
  • affected from 4.5.0 to 4.5.0.52 (excl.)
  • affected from 4.6.0 to 4.6.0.16 (excl.)
Vendor WSO2
Product WSO2 Carbon API Management Implementation
Versions Default: unknown
  • affected from 9.30.67 to 9.30.67.156 (excl.)
  • affected from 9.31.86 to 9.31.86.141 (excl.)
  • affected from 9.32.147 to 9.32.147.44 (excl.)
  • unaffected from 9.33.104 to * (incl.)
Vendor WSO2
Product WSO2 API Manager Publisher REST API V4
Versions Default: unknown
  • affected from 9.30.67 to 9.30.67.156 (excl.)
  • affected from 9.31.86 to 9.31.86.141 (excl.)
  • affected from 9.32.147 to 9.32.147.44 (excl.)
  • unaffected from 9.33.104 to * (incl.)
Vendor WSO2
Product WSO2 Carbon API Management API
Versions Default: unknown
  • affected from 9.30.67 to 9.30.67.156 (excl.)
  • unaffected from 9.33.104 to * (incl.)

Solutions

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/#solution

References

Problem Types

  • CWE-434: Unrestricted Upload of File with Dangerous Type CWE

Impacts

  • CAPEC-232 CAPEC-232: File Upload Vulnerability