CVE-2021-41599: GitHub Enterprise Server

High severity, CVSS 8.8. EPSS: 2.2% chance of exploitation in the next 30 days.

A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.3 and was fixed in versions 3.0.21, 3.1.13, 3.2.5. This vulnerability was reported via the GitHub Bug Bounty program.

Affected products

• GitHub Enterprise Server: from 3.0.0, before 3.0.21 (fixed in 3.0.21); from 3.1.0, before 3.1.13 (fixed in 3.1.13); from 3.2.0, before 3.2.5 (fixed in 3.2.5)

Published 2022-02-18. Last modified 2026-06-17.