CVE-2026-3418 json
Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
published 2026-08-06 3 mo ago modified 2026-09-23 46 d ago also EUVD-2026-54209
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- WSO2 WSO2 API Manager 4.4.0.67, 4.5.0.52, 4.6.0.16
- WSO2 WSO2 Traffic Manager 4.5.0.51, 4.6.0.16
- WSO2 WSO2 API Control Plane 4.5.0.53, 4.6.0.17
- WSO2 WSO2 Universal Gateway 4.5.0.52, 4.6.0.16
- WSO2 WSO2 Carbon API Management Implementation 9.30.67.156, 9.31.86.141, 9.32.147.44, 9.33.104
- WSO2 WSO2 API Manager Publisher REST API V4 9.30.67.156, 9.31.86.141, 9.32.147.44, 9.33.104
- WSO2 WSO2 Carbon API Management API 9.30.67.156, 9.33.104
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
Affected products
- WSO2 WSO2 API Manager
- WSO2 WSO2 Traffic Manager
- WSO2 WSO2 API Control Plane
- WSO2 WSO2 Universal Gateway
- WSO2 WSO2 Carbon API Management Implementation
- WSO2 WSO2 API Manager Publisher REST API V4
- WSO2 WSO2 Carbon API Management API
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
Sources
- CVE List CVE-2026-3418
- NVD CVE-2026-3418
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.