# CVE-2025-8447: Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed read-only access

> CVE-2025-8447: Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed read-only access. CVSS 3.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-8447
Last updated: 2026-06-17T10:07:00Z

- Published: 2025-08-26 01:42 UTC · Updated: 2026-06-17 10:07 UTC · Assigner: GitHub\_P
- CVSS: 3.1 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS: 0.31%, 24th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-639

## 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.

## Affected vendors and products

- GitHub: Enterprise Server

## Tracked companies

- [GitHub](https://rewindex.com/company/github.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-8447)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-8447)
- [https://docs.github.com/en/enterprise-server@3.14/admin/release-notes\#3.14.17](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@3.15/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@3.16/admin/release-notes#3.16.8)
- [https://docs.github.com/en/enterprise-server@3.17/admin/release-notes\#3.17.5](https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.5)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-8447 · Markdown: https://rewindex.com/cve/CVE-2025-8447.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-8447 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:14.747Z