Riskcovery

CVE-2026-5512

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

State
Published
Severity
5.3 Medium
Published
Apr 21, 2026
Updated
Apr 22, 2026
Reserved
Apr 3, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.05.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:NGitHub_P

Weaknesses

  • CWE-201 Insertion of sensitive information into sent data

Affected Products

ProductVersions
Enterprise ServerGitHub
  • 3.14.0 through 3.14.25Affectedfrom 3.14.26Not affected
  • 3.15.0 through 3.15.20Affectedfrom 3.15.21Not affected
  • 3.16.0 through 3.16.16Affectedfrom 3.16.17Not affected
  • 3.17.0 through 3.17.13Affectedfrom 3.17.14Not affected
  • 3.18.0 through 3.18.7Affectedfrom 3.18.8Not affected
  • 3.19.0 through 3.19.4Affectedfrom 3.19.5Not affected
  • 3.20.0 to before 3.20.1Affectedfrom 3.20.1Not affected

References

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