CVE-2023-23763

Information disclosure in GitHub Enterprise Server leading to private repository leakage

Description

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.

Categories

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.11%
Affected: GitHub Enterprise Server
Published at:
Updated at:

References

Link Tags
https://docs.github.com/en/enterprise-server@3.6/admin/release-notes#3.6.18-security-fixes release notes
https://docs.github.com/en/enterprise-server@3.7/admin/release-notes#3.7.16-security-fixes release notes
https://docs.github.com/en/enterprise-server@3.8/admin/release-notes#3.8.9-security-fixes release notes
https://docs.github.com/en/enterprise-server@3.9/admin/release-notes#3.9.4-security-fixes release notes

Frequently Asked Questions

What is the severity of CVE-2023-23763?
CVE-2023-23763 has been scored as a medium severity vulnerability.
How to fix CVE-2023-23763?
To fix CVE-2023-23763, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-23763 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-23763 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-23763?
CVE-2023-23763 affects GitHub Enterprise Server.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.