# CVE-2026-3307: Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cross-repository modification of delegated bypass reviewers

> CVE-2026-3307: Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cross-repository modification of delegated bypass reviewers. CVSS 2.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-3307
Last updated: 2026-06-17T10:43:22Z

- Published: 2026-04-21 22:23 UTC · Updated: 2026-06-17 10:43 UTC · Assigner: GitHub\_P
- CVSS: 2.7 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
- EPSS: 0.27%, 19th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-639

## Description

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed an attacker with admin access on one repository to modify the secret scanning push protection delegated bypass reviewer list on another repository by manipulating the owner\_id parameter in the request body. Authorization was verified against the repository in the URL, but the action was applied to a different repository specified in the request body. The impact is limited to assigning existing trusted users as bypass reviewers; it does not allow adding arbitrary external users. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7, 3.19.4 and 3.20.1. 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-2026-3307)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-3307)
- [https://docs.github.com/en/enterprise-server@3.14/admin/release-notes\#3.14.25](https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.25)
- [https://docs.github.com/en/enterprise-server@3.15/admin/release-notes\#3.15.20](https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.20)
- [https://docs.github.com/en/enterprise-server@3.16/admin/release-notes\#3.16.16](https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.16)
- [https://docs.github.com/en/enterprise-server@3.17/admin/release-notes\#3.17.13](https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.13)
- [https://docs.github.com/en/enterprise-server@3.18/admin/release-notes\#3.18.7](https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.7)
- [https://docs.github.com/en/enterprise-server@3.19/admin/release-notes\#3.19.4](https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.4)
- [https://docs.github.com/en/enterprise-server@3.20/admin/release-notes\#3.20.1](https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.1)

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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-2026-3307 · Markdown: https://rewindex.com/cve/CVE-2026-3307.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-3307 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:40.974Z