CVE-2023-23763: GitHub Enterprise Server

Medium severity, CVSS 5.3. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• GitHub Enterprise Server: from 3.6.0, before 3.6.18 (fixed in 3.6.18); from 3.7.0, before 3.7.16 (fixed in 3.7.16); from 3.8.0, before 3.8.9 (fixed in 3.8.9); from 3.9.0, before 3.9.4 (fixed in 3.9.4)

Published 2023-09-01. Last modified 2026-06-17.