# CVE-2026-75101: Authorization bypass vulnerability in GitHub Enterprise Server allowed reading of private pull request diffs and patches via repository name collision

> CVE-2026-75101: Authorization bypass vulnerability in GitHub Enterprise Server allowed reading of private pull request diffs and patches via repository name collision. CVSS 6.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-75101
Last updated: 2026-10-02T18:46:47Z

- Published: 2026-09-22 20:43 UTC · Updated: 2026-10-02 18:46 UTC · Assigner: GitHub\_P
- CVSS: 6.5 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS: 0.29%, 21th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-639

## 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.

## Affected vendors and products

- GitHub: Enterprise Server

## Tracked companies

- [GitHub](https://rewindex.com/company/github.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-75101)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-75101)
- [https://docs.github.com/en/enterprise-server@3.17/admin/release-notes\#3.17.21](https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.21)
- [https://docs.github.com/en/enterprise-server@3.18/admin/release-notes\#3.18.15](https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.15)
- [https://docs.github.com/en/enterprise-server@3.19/admin/release-notes\#3.19.12](https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.12)
- [https://docs.github.com/en/enterprise-server@3.20/admin/release-notes\#3.20.8](https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.8)
- [https://docs.github.com/en/enterprise-server@3.21/admin/release-notes\#3.21.6](https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.6)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-75101 · Markdown: https://rewindex.com/cve/CVE-2026-75101.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-75101 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:22.748Z