Medium severity4.3NVD Advisory· Published Apr 21, 2026· Updated Apr 29, 2026
CVE-2026-5512
CVE-2026-5512
Description
An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of private repositories by their numeric ID. The mobile upload policy API endpoint did not perform an early authorization check, and validation error messages included the full repository name for repositories the caller did not have access to. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*range: <3.14.26
- cpe:2.3:a:github:enterprise_server:3.20.0:*:*:*:*:*:*:*
- (no CPE)range: <3.21
Patches
Vulnerability mechanics
References
7- docs.github.com/en/enterprise-server@3.14/admin/release-notesnvdRelease NotesVendor Advisory
- docs.github.com/en/enterprise-server@3.15/admin/release-notesnvdRelease NotesVendor Advisory
- docs.github.com/en/enterprise-server@3.16/admin/release-notesnvdRelease NotesVendor Advisory
- docs.github.com/en/enterprise-server@3.17/admin/release-notesnvdRelease NotesVendor Advisory
- docs.github.com/en/enterprise-server@3.18/admin/release-notesnvdRelease NotesVendor Advisory
- docs.github.com/en/enterprise-server@3.19/admin/release-notesnvdRelease NotesVendor Advisory
- docs.github.com/en/enterprise-server@3.20/admin/release-notesnvdRelease NotesVendor Advisory
News mentions
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