Auth bypass in Github Enterprise Server
CVE-2026-5845
An improper authorization vulnerability in scoped user-to-server (ghu_) token authorization in GitHub Enterprise Server allows an authenticated attacker to access private repositories outside the intended installation scope, which can incl…
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.000 (7.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
Affected products
- Github Enterprise Server — versions 3.20.0, 3.19.0, 3.18.0
- Github Enterprise_server — versions 3.20.0
Weakness classification (CWE)
References
- product-cna@github.com (Release Notes, Vendor Advisory)
- product-cna@github.com (Release Notes, Vendor Advisory)
- product-cna@github.com (Release Notes, Vendor Advisory)
- product-cna@github.com (Release Notes, Vendor Advisory)
- product-cna@github.com (Release Notes, Vendor Advisory)
- product-cna@github.com (Release Notes, Vendor Advisory)
- product-cna@github.com (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-5845?
- CVE-2026-5845 is a critical-severity vulnerability in Github Enterprise Server, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.6/10. Published 2026-04-21.
- How severe is CVE-2026-5845?
- Critical severity. CVSS v3 base score is 9.6 out of 10.