What’s Vulnerable › Vulnerabilities

CVE-2021-31799

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-30 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• Debian Linux: 9.0, 10.0
• Oracle Corporation JD Edwards EnterpriseOne Tools: before 9.2.6.1 — fixed in 9.2.6.1
• ruby-lang Rdoc: from 3.11 before 6.3.1 — fixed in 6.3.1

How to fix

Upgrade to a fixed version: Oracle Corporation JD Edwards EnterpriseOne Tools 9.2.6.1; ruby-lang Rdoc 6.3.1. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html
• https://security-tracker.debian.org/tracker/CVE-2021-31799
• https://security.gentoo.org/glsa/202401-05
• https://security.netapp.com/advisory/ntap-20210902-0004/
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://www.ruby-lang.org/en/news/2021/05/02/os-command-injection-in-rdoc/
• https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html
• https://security-tracker.debian.org/tracker/CVE-2021-31799
• https://security.gentoo.org/glsa/202401-05
• https://security.netapp.com/advisory/ntap-20210902-0004/
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://www.ruby-lang.org/en/news/2021/05/02/os-command-injection-in-rdoc/

Get alerted when CVE-2021-31799 or the next vulnerability affects your stack