Auth bypass in Github Enterprise Server
CVE-2026-6736
An authentication bypass vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to create a local user account, bypassing the configured external identity provider. When external authentication wa…
Vulnerability class: Broken Authentication
EPSS: 0.002 (37.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Github Enterprise Server — versions 3.16.0, 3.17.0, 3.18.0
- Github Enterprise_server
Weakness classification (CWE)
References
- product-cna@github.com (release-notes, Release Notes, Vendor Advisory)
- product-cna@github.com (release-notes, Release Notes, Vendor Advisory)
- product-cna@github.com (release-notes, Release Notes, Vendor Advisory)
- product-cna@github.com (release-notes, Release Notes, Vendor Advisory)
- product-cna@github.com (release-notes, Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-6736?
- CVE-2026-6736 is a medium-severity vulnerability in Github Enterprise Server, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-05-07.
- How severe is CVE-2026-6736?
- Medium severity. CVSS v3 base score is 6.5 out of 10.