Information disclosure in GitHub Enterprise Server leading to private repository leakage
Priority LOW 31CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure, Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-862.
Summary
An authorization/sensitive information disclosure vulnerability was identified in GitHub Enterprise Server that allowed a fork to retain read access to an upstream repository after its visibility was changed to private. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.10.0 and was fixed in versions 3.9.4, 3.8.9, 3.7.16 and 3.6.18. This vulnerability was reported via the GitHub Bug Bounty program.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00667 52nd percentileScored 2026-11-07
Fix Fixed Enterprise Server (GitHub): 3.6.18, 3.7.16, 3.8.9 +1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| GitHub | Enterprise Server | 3.6.0 to before 3.6.18; 3.7.0 to before 3.7.16; 3.8.0 to before 3.8.9; 3.9.0 to before 3.9.4 | 3.6.18, 3.7.16, 3.8.9, 3.9.4 | Patch available | CNA |
- Enterprise Server VendorGitHub Affected 3.6.0 to before 3.6.18; 3.7.0 to before 3.7.16; 3.8.0 to before 3.8.9; 3.9.0 to before 3.9.4 Fixed in 3.6.18, 3.7.16, 3.8.9, 3.9.4 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* | 3.6.0 to before 3.6.18; 3.7.0 to before 3.7.16; 3.8.0 to before 3.8.9; 3.9.0 to before 3.9.4 | Vulnerable | GitHub |
- cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* Versions 3.6.0 to before 3.6.18; 3.7.0 to before 3.7.16; 3.8.0 to before 3.8.9; 3.9.0 to before 3.9.4 Vulnerable ·GitHub
Remediation
- Fix · CNA Enterprise Server (GitHub) Fixed in 3.6.18, 3.7.16, 3.8.9, 3.9.4
Timeline
- 2026-10-02 Threatist record created from CVE-2023-23763
- 2026-10-03 Alias added: GHSA-3rw4-472r-hwgm
References
Other 4
- https://docs.github.com/en/[email protected]/admin/release-notes#3.6.18-security-fixes
- https://docs.github.com/en/[email protected]/admin/release-notes#3.7.16-security-fixes
- https://docs.github.com/en/[email protected]/admin/release-notes#3.8.9-security-fixes
- https://docs.github.com/en/[email protected]/admin/release-notes#3.9.4-security-fixes
More GitHub Enterprise Server vulnerabilities
- TI-2024-04632 An authentication bypass vulnerability was present in the GitHub Enterprise Server (GHES)… CVSS 4.0CRITICAL 10.0
- TI-2024-00181 Unsafe Reflection in Github Enterprise Server leading to Command Injection CVSS 3.1CRITICAL 9.8
- TI-2024-00466 Privilege Escalation by Code Injection in the Management Console in GitHub Enterprise Server CVSS 3.1HIGH 8.8
- TI-2026-03340 Remote code execution via git push option injection in GitHub Enterprise Server CVSS 4.0HIGH 8.7
- TI-2024-08804 Improper signature verification in GitHub Enterprise Server CVSS 4.0CRITICAL 9.5
- TI-2026-08177 Server-side request forgery in GitHub Enterprise Server CVSS 4.0CRITICAL 9.2
Sources
- CVE-2023-23763 · CVE Program
- CVE-2023-23763 · NVD
- FIRST EPSS
- GHSA-3rw4-472r-hwgm · GitHub Advisory Database · CC BY 4.0
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