Vulnerability Intelligence Report
Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
CVE-2026-3418
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 Active Exploit Signals
CVSS Base Score
9.1
CRITICAL
Exploitability:2.3
Impact Score:6.1
EPSS Probability:0.57%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-434 ↗CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| WSO2 | WSO2 API Manager | 4.4.0 < 4.4.0.67 (affected), 4.5.0 < 4.5.0.52 (affected), 4.6.0 < 4.6.0.16 (affected) |
| WSO2 | WSO2 Traffic Manager | 4.5.0 < 4.5.0.51 (affected), 4.6.0 < 4.6.0.16 (affected) |
| WSO2 | WSO2 API Control Plane | 4.5.0 < 4.5.0.53 (affected), 4.6.0 < 4.6.0.17 (affected) |
| WSO2 | WSO2 Universal Gateway | 4.5.0 < 4.5.0.52 (affected), 4.6.0 < 4.6.0.16 (affected) |
| WSO2 | WSO2 Carbon API Management Implementation | 9.30.67 < 9.30.67.156 (affected), 9.31.86 < 9.31.86.141 (affected), 9.32.147 < 9.32.147.44 (affected), 9.33.104 <= * (unaffected) |
| WSO2 | WSO2 API Manager Publisher REST API V4 | 9.30.67 < 9.30.67.156 (affected), 9.31.86 < 9.31.86.141 (affected), 9.32.147 < 9.32.147.44 (affected), 9.33.104 <= * (unaffected) |
| WSO2 | WSO2 Carbon API Management API | 9.30.67 < 9.30.67.156 (affected), 9.33.104 <= * (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.573%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | WSO2 LLC · Vendor · USA |
| Reserved | 2026-03-01T18:52:59 |
| Published | 2026-08-06T17:32:14 |
| Last Updated | 2026-09-23T15:30:30 |
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