Vulnerability Description
A reflected HTML injection vulnerability was identified in the GitHub Enterprise Server Management Console login page that could allow credential theft. The redirect_to query parameter on the /setup/unlock endpoint was reflected into an HTML attribute without proper sanitization, enabling an attacker to inject a form element that could capture administrator credentials. Exploitation required an administrator to click a crafted link and enter their credentials. This vulnerability affected GitHub Enterprise Server versions 3.19.1 through 3.19.5 and 3.20.0 through 3.20.1, and was fixed in versions 3.19.6 and 3.20.2. This vulnerability was reported via the GitHub Bug Bounty program.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Github | Enterprise Server | >= 3.19.1, < 3.19.6 |
Related Weaknesses (CWE)
References
- https://docs.github.com/en/[email protected]/admin/release-notes#3.19.6Release NotesVendor Advisory
- https://docs.github.com/en/[email protected]/admin/release-notes#3.20.2Release NotesVendor Advisory
FAQ
What is CVE-2026-8106?
CVE-2026-8106 is a vulnerability with a CVSS score of 6.1 (MEDIUM). A reflected HTML injection vulnerability was identified in the GitHub Enterprise Server Management Console login page that could allow credential theft. The redirect_to query parameter on the /setup/u...
How severe is CVE-2026-8106?
CVE-2026-8106 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-8106?
Check the references section above for vendor advisories and patch information. Affected products include: Github Enterprise Server.