Skip to content
CVE PROGRAM SOURCE RECORD6.0 Medium

CVE-2026-9132

Missing authorization vulnerability in GitHub Enterprise Server allowed disclosure of private repository contents via the Copilot pull request diff summary endpoint

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
GitHub_P

Description

A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to read source code from private repositories they did not have access to. The Copilot pull request description diff summary endpoint accepted a cross-repository comparison range and rendered the resulting diff without verifying that the requesting user was authorized to view the target repository. Exploitation required an authenticated account on the instance with read access to at least one repository to use as the comparison base. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, and 3.20.4. 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: unaffected

  • 3.17.0 to ≤ 3.17.16affected
  • 3.18.0 to ≤ 3.18.10affected
  • 3.19.0 to ≤ 3.19.7affected
  • 3.20.0 to ≤ 3.20.3affected

References