CVE-2026-9106: A UI misrepresentation vulnerability was identified in GitHub Enterprise Server that allowed an OAuth applicat

Routine

MEDIUM 5.5UPGRADE

CVE-2026-9106 is a medium-severity flaw (CVSS 5.5) affecting enterprise server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 En

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-451
Published	2026-06-30
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. (Products Only) · Vendor: github

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-30 21:16 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

github enterprise server UPGRADE

Affected: < 3.16.20 · >= 3.17.0 and < 3.17.17 · >= 3.18.0 and < 3.18.11 · >= 3.19.0 and < 3.19.8 · >= 3.20.0 and < 3.20.4 · >= 3.21.0 and < 3.21.2

Fixed in: 3.16.20, 3.17.17, 3.18.11, 3.19.8, 3.20.4, 3.21.2

Safe to downgrade to: a release before 3.17.0

1. Check installed version

apt-cache policy enterprise-server || rpm -q enterprise-server || enterprise-server --version

2. UPGRADE to 3.16.20 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade enterprise-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade enterprise-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.17.0 (Debian / Ubuntu)

apt-cache madison enterprise-server sudo apt install enterprise-server=<VERSION_BEFORE_3.17.0> sudo apt-mark hold enterprise-server

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list enterprise-server sudo dnf downgrade enterprise-server-<VERSION_BEFORE_3.17.0> sudo dnf versionlock add enterprise-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-9106?

enterprise server: upgrade to 3.16.20, 3.17.17, 3.18.11, 3.19.8, 3.20.4, 3.21.2. Exact commands for each OS are on this page.

Is CVE-2026-9106 being exploited?

CVE-2026-9106 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-9106 affect?

CVE-2026-9106 affects enterprise server. Severity is medium (CVSS 5.5). 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 applicat

How urgent is CVE-2026-9106?

Priority 27/100. No elevated risk signals yet.

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2026-9132 MEDIUM 6.5 UPGRADE A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated
CVE-2026-10585 MEDIUM 5.4 UPGRADE A stored cross-site scripting vulnerability was identified in GitHub Enterprise Server that allowed an authent
CVE-2026-14340 MEDIUM 5.0 UPGRADE An incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed a user-to-ser
CVE-2026-17556 CRITICAL 9.1 UPGRADE A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated atta
CVE-2026-15996 HIGH 7.5 UPGRADE A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated a

References

← Back to latest CVEs