Details
- Type
- Server-Side Request Forgery
- Impact
- Remote Code Execution, Information Disclosure
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 22 September 2026
- Updated
- 15 October 2026
- Weakness
- CWE-208
Vendor fix
Update to versions 3.22.1, 3.21.6, 3.20.8, 3.19.12, 3.18.15, 3.17.21 or later.
Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-77987
- https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.12
- https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.8
- https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.6
- https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.1
- https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.21
- https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.15