Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed read-only access
Vulnerability Description
An improper access control vulnerability was identified in GitHub Enterprise Server that allowed users with access to any repository to retrieve limited code content from another repository by creating a diff between the repositories. To exploit this vulnerability, an attacker needed to know the name of a private repository along with its branches, tags, or commit SHAs that they could use to trigger compare/diff functionality and retrieve limited code without proper authorization. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18, and was fixed in versions 3.14.17, 3.15.12, 3.16.8 and 3.17.5. This vulnerability was reported via the GitHub Bug Bounty program.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-8447
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- furbreeze
References
- https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.17
- https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.12
- https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.8
- https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.5
More from GitHub
View All →Affected Vendor
GitHub
View all reports →