CVE-2026-3418
Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
No known exploitation. EPSS puts it in the 53rd percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.8% chance of exploitation activity in the next 30 days, which ranks it in the 53rd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
10 events over 47 days, from the signal feeds we watch.
- Patch availablerecord updated
- Patch availablerecord updated
- Patch availablepublished, weakness classified, att&ck mapped, record updated
- OpenVAS check added
Affected products
- WSO2 API ManagerCloud & SaaS / api-gateway
- WSO2 Traffic ManagerNetworking Infrastructure / load-balancer-proxy
- WSO2 API Control PlaneCloud & SaaS / api-gateway
- WSO2 Universal GatewaySecurity Products / secure-gateway-vpn
- WSO2 Carbon API Management ImplementationCloud & SaaS / api-gateway
- WSO2 API Manager Publisher REST API V4Cloud & SaaS / api-gateway
- WSO2 Carbon API Management APICloud & SaaS / api-gateway
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Scored 9.1 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required HighRequires admin or elevated privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Command and ControlT1105Ingress Tool Transferhigh confidence
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- PersistenceT1505Server Software Componenthigh confidence
Sources
References in the record
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