CVE-2026-9106

EUVD-2026-40407
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.
UI
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitHub_PCNA
5.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 11.1%
Affected Products (NVD)
VendorProductVersion
githubenterprise_server
𝑥
< 3.16.20
githubenterprise_server
3.17.0 ≤
𝑥
< 3.17.17
githubenterprise_server
3.18.0 ≤
𝑥
< 3.18.11
githubenterprise_server
3.19.0 ≤
𝑥
< 3.19.8
githubenterprise_server
3.20.0 ≤
𝑥
< 3.20.4
githubenterprise_server
3.21.0 ≤
𝑥
< 3.21.2
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
githubgithub
3.17.0 ≤
𝑥
≤ 3.17.16
CNA
githubgithub
3.18.0 ≤
𝑥
≤ 3.18.10
CNA
githubgithub
3.19.0 ≤
𝑥
≤ 3.19.7
CNA
githubgithub
3.20.0 ≤
𝑥
≤ 3.20.3
CNA
githubgithub
3.21.0 ≤
𝑥
≤ 3.21.1
CNA
githubgithub
3.16.0 ≤
𝑥
≤ 3.16.19
CNA