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Vulnerability record · CVE-2026-3418 · published 6 August 2026

CVE-2026-3418: Unrestricted file upload vulnerability

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.

9.1 CVSS 3.1 Critical EPSS 0.76% · top 46.5% CWE-434 · Unrestricted file upload Deferred
9.1CVSS 3.1 base score
0.76%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
31 Aug 2026Last modified by NVD

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.

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

References

LinkTags
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-3418), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.