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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-5512

Improper authorization vulnerability in GitHub Enterprise Server allowed disclosure of private repository names via mobile upload policy API

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Status
Published
Published
Updated
Assigning organization
GitHub_P

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

GitHub Enterprise Server

Default version status: affected

  • 3.14.0 to ≤ 3.14.25affected
  • 3.15.0 to ≤ 3.15.20affected
  • 3.16.0 to ≤ 3.16.16affected
  • 3.17.0 to ≤ 3.17.13affected
  • 3.18.0 to ≤ 3.18.7affected
  • 3.19.0 to ≤ 3.19.4affected
  • 3.20.0 to < 3.20.1affected

References