CVE-2026-9106

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 v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-451 CWE-451

Affected Products

Vendor	Product	Versions
github	enterprise_server	< 3.16.20
github	enterprise_server	3.17.0 — 3.17.17
github	enterprise_server	3.18.0 — 3.18.11
github	enterprise_server	3.19.0 — 3.19.8
github	enterprise_server	3.20.0 — 3.20.4
github	enterprise_server	3.21.0 — 3.21.2

References

Other References

https://docs.github.com/en/[email protected]/admin/release-notes#3.16.20 https://docs.github.com/en/[email protected]/admin/release-notes#3.17.17 https://docs.github.com/en/[email protected]/admin/release-notes#3.18.11 https://docs.github.com/en/[email protected]/admin/release-notes#3.19.8 https://docs.github.com/en/[email protected]/admin/release-notes#3.20.4 https://docs.github.com/en/[email protected]/admin/release-notes#3.21.2

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-9106? +

CVE-2026-9106 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-9106? +

CVE-2026-9106 affects products from github, specifically: enterprise_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-9106? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2024-52277

User Interface (UI) Misrepresentation of Critical Information vulnerability in DocuSeal allows Content Spoofing.Displayed version does not show the layer flattened …

CVE-2024-52270

User Interface (UI) Misrepresentation of Critical Information vulnerability in DropBox Sign(HelloSign) allows Content Spoofing. Displayed version does not show the …

CVE-2024-52271

User Interface (UI) Misrepresentation of Critical Information vulnerability in Documenso allows Content Spoofing.Displayed version does not show the layer flattened …

CVE-2025-8043 9.8

Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in Firefox 141.

CVE-2025-31951 8.8

HCL BigFix RunBookAI is affected by a Unvalidated Command Input / Potential Command Smuggling vulnerability. A flaw in a component's …

CVE-2024-0750 8.8

A bug in popup notifications delay calculation could have made it possible for an attacker to trick a user into …