cve/2021/CVE-2021-31799.md

### [CVE-2021-31799](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31799)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In RDoc 3.11 through 6.x before 6.3.1, as distributed with Ruby through 3.0.1, it is possible to execute arbitrary code via | and tags in a filename.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpuapr2022.html

#### Github
- https://github.com/EdgeSecurityTeam/Vulnerability
- https://github.com/tzwlhack/Vulnerability