cve/2021/CVE-2021-21430.md

### [CVE-2021-21430](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21430)
![](https://img.shields.io/static/v1?label=Product&message=openapi-generator&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-269%3A%20Improper%20Privilege%20Management&color=brighgreen)

### Description

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. Affected generators: `java` (jersey2, okhttp-gson (default library)), `scala-finch`. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.

### POC

#### Reference
- https://github.com/OpenAPITools/openapi-generator/pull/8791

#### Github
No PoCs found on GitHub currently.