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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
WSO2 WSO2 API Manager unaffected
Version Status Constraints
4.4.0 affected < 4.4.0.67
4.5.0 affected < 4.5.0.52
4.6.0 affected < 4.6.0.16
WSO2 WSO2 Traffic Manager unaffected
Version Status Constraints
4.5.0 affected < 4.5.0.51
4.6.0 affected < 4.6.0.16
WSO2 WSO2 API Control Plane unaffected
Version Status Constraints
4.5.0 affected < 4.5.0.53
4.6.0 affected < 4.6.0.17
WSO2 WSO2 Universal Gateway unaffected
Version Status Constraints
4.5.0 affected < 4.5.0.52
4.6.0 affected < 4.6.0.16
WSO2 WSO2 Carbon API Management Implementation unknown
Version Status Constraints
9.30.67 affected < 9.30.67.156
9.31.86 affected < 9.31.86.141
9.32.147 affected < 9.32.147.44
9.33.104 unaffected ≤ *
WSO2 WSO2 API Manager Publisher REST API V4 unknown
Version Status Constraints
9.30.67 affected < 9.30.67.156
9.31.86 affected < 9.31.86.141
9.32.147 affected < 9.32.147.44
9.33.104 unaffected ≤ *
WSO2 WSO2 Carbon API Management API unknown
Version Status Constraints
9.30.67 affected < 9.30.67.156
9.33.104 unaffected ≤ *

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Project Subscriptions

Vendors Products
Wso2 Subscribe
Wso2 Api Control Plane Subscribe
Wso2 Api Manager Subscribe
Wso2 Api Manager Publisher Rest Api V4 Subscribe
Wso2 Carbon Api Management Api Subscribe
Wso2 Carbon Api Management Implementation Subscribe
Wso2 Traffic Manager Subscribe
Wso2 Universal Gateway Subscribe
Advisories

No advisories yet.

Fixes

Solution

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

Workaround

No workaround given by the vendor.

References
Link Providers
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/ cve-icon
History

Thu, 06 Aug 2026 22:15:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: WSO2

Published:

Updated: 2026-08-06T17:32:14.823Z

Reserved: 2026-03-01T18:52:59.606Z

Link: CVE-2026-3418

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-07T01:00:05Z

Weaknesses