Vulnerability in Github Enterprise Server
CVE-2026-9106
A UI misrepresentation vulnerability was identified in GitHub Enterprise Server that allowed an OAuth application to gain unintended access to an organization's runner management. An attacker could exploit this by creating an OAuth application requesting the manage_runners:org scope and directing a victim user to authorize it, as the scope was not displayed on the authorization consent screen. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.21.2, 3.20.4, 3.19.8, 3.18.11, 3.17.17, 3.16.20. This vulnerability was reported via the GitHub Bug Bounty program.
EPSS: 0.002 (11.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.
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)
- product-cna@github.com (release-notes, Release Notes)
- product-cna@github.com (release-notes, Release Notes)
- product-cna@github.com (release-notes, Release Notes)
- product-cna@github.com (release-notes, Release Notes)
- product-cna@github.com (release-notes, Release Notes)
Frequently asked questions
- What is CVE-2026-9106?
- CVE-2026-9106 is a medium-severity vulnerability in Github Enterprise Server, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.5/10. Published 2026-06-30.
- How severe is CVE-2026-9106?
- Medium severity. CVSS v3 base score is 5.5 out of 10.