Medium severity · published Jun 30, 2026
CVE-2026-9106
UI misrepresentation vulnerability in GitHub Enterprise Server allowed unauthorized organization runner management via undisclosed OAuth scope on consent screen
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
Enterprise Server · GitHub
3.17.0 through 3.17.16; 3.18.0 through 3.18.10; 3.19.0 through 3.19.7; 3.20.0 through 3.20.3; 3.21.0 through 3.21.1; 3.16.0 through 3.16.19 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9106
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9106
Release Notes
https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.20
Release Notes
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17
Release Notes
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11
Release Notes
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8
Release Notes
https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4
Release Notes
https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.2
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