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CVE-2026-75101 Details

Description

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to the repository name and pull request number rather than to a globally unique repository identifier, so an attacker who created a repository and pull request matching a target's repository name and pull request number could use a token for their own repository to retrieve the private pull request's contents. Exploitation required the attacker to know the target repository's name and a valid pull request number. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.21, 3.18.15, 3.19.12, 3.20.8, and 3.21.6. This vulnerability was reported via the GitHub Bug Bounty program.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://docs.github.com/en/[email protected]/admin/release-notes#3.17.21	[email protected]	Release NotesVendor Advisory
https://docs.github.com/en/[email protected]/admin/release-notes#3.18.15	[email protected]	Release NotesVendor Advisory
https://docs.github.com/en/[email protected]/admin/release-notes#3.19.12	[email protected]	Release NotesVendor Advisory
https://docs.github.com/en/[email protected]/admin/release-notes#3.20.8	[email protected]	Release NotesVendor Advisory
https://docs.github.com/en/[email protected]/admin/release-notes#3.21.6	[email protected]	Release NotesVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-639	Authorization Bypass Through User-Controlled Key	[email protected]

Affected Products

Product	Versions
github enterprise server	>= 3.17.0, < 3.17.21 >= 3.18.0, < 3.18.15 >= 3.19.0, < 3.19.12 >= 3.20.0, < 3.20.8 >= 3.21.0, < 3.21.6
CPE cpe:2.3:a:github:enterprise_server:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 2, 2026	Initial Analysis	[email protected]
Sep 23, 2026	CVE Modified	CISA-ADP
Sep 22, 2026	New CVE Received	[email protected]