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GitHub Enterprise Server Multiple Vulnerabilities

September 3, 2026 · HKCERT · Severity: HIGH

Multiple vulnerabilities were identified in GitHub Enterprise Server. A remote attacker could exploit some of these vulnerabilities to trigger security restriction bypass, remote code execution and spoofing on the targeted system. Impact Remote Code Execution Security Restriction Bypass Spoofing System / Technologies affected GitHub Enterprise Server versions prior to 3.21.5 Solutions Before installation of the software, please visit the vendor web-site for more details.   Apply fixes issued by the vendor: Update to GitHub Enterprise Server versions 3.21.5

Key Takeaways

  • HKCERT reports multiple GitHub Enterprise Server vulnerabilities requiring immediate patching by organizations hosting self-managed GitHub instances.
  • Organizations should review the full article for complete details and implement relevant security measures.
  • Organizations should review the full article for complete details and implement relevant security measures.
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