CVE-2021-22864 : faille élevée github enterprise server (CVSS 8.8)

A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to override environment variables leading to code execution on the GitHub Enterprise Server instance. 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 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program.

Sévérité

Élevée (CVSS 8.8)

Vecteur CVSS

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

23 mars 2021

Dernière mise à jour

17 juin 2026

• github enterprise server

• Fiche CVE-2021-22864 sur le NVD (NIST)
• docs.github.com/en/enterprise-server%402.21/admin/release-notes
• docs.github.com/en/enterprise-server%402.22/admin/release-notes
• docs.github.com/en/enterprise-server%403.0/admin/release-notes