CVE-2026-3418

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

Published Aug 6, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

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

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Wso2 api Control Plane
Wso2 api Manager
Wso2 carbon Api Management Api
Wso2 traffic Manager
Wso2 universal Gateway
Vendors & Products Wso2 api Control Plane
Wso2 api Manager
Wso2 carbon Api Management Api
Wso2 traffic Manager
Wso2 universal Gateway
Type Values Removed Values Added
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.
Title Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
First Time appeared Wso2
Wso2 wso2 Api Control Plane
Wso2 wso2 Api Manager
Wso2 wso2 Api Manager Publisher Rest Api V4
Wso2 wso2 Carbon Api Management Api
Wso2 wso2 Carbon Api Management Implementation
Wso2 wso2 Traffic Manager
Wso2 wso2 Universal Gateway
Weaknesses CWE-434
CPEs cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_api_manager_publisher_rest_api_v4:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_carbon_api_management_api:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_carbon_api_management_implementation:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_traffic_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_universal_gateway:*:*:*:*:*:*:*:*
Vendors & Products Wso2
Wso2 wso2 Api Control Plane
Wso2 wso2 Api Manager
Wso2 wso2 Api Manager Publisher Rest Api V4
Wso2 wso2 Carbon Api Management Api
Wso2 wso2 Carbon Api Management Implementation
Wso2 wso2 Traffic Manager
Wso2 wso2 Universal Gateway
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}