# CVE-2026-3306: Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access

> CVE-2026-3306: Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access. CVSS 4.3 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-3306
Last updated: 2026-06-17T10:43:22Z

- Published: 2026-03-10 17:46 UTC · Updated: 2026-06-17 10:43 UTC · Assigner: GitHub\_P
- CVSS: 4.3 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- EPSS: 0.37%, 30th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-639

## Description

An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed a user with read access to a repository and write access to a project to modify issue and pull request metadata through the project. When adding an item to a project that already existed, column value updates were applied without verifying the actor's repository write permissions. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3.

## 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-2026-3306)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-3306)
- [https://docs.github.com/en/enterprise-server@3.14/admin/release-notes\#3.14.24](https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.24)
- [https://docs.github.com/en/enterprise-server@3.15/admin/release-notes\#3.15.19](https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.19)
- [https://docs.github.com/en/enterprise-server@3.16/admin/release-notes\#3.16.15](https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.15)
- [https://docs.github.com/en/enterprise-server@3.17/admin/release-notes\#3.17.12](https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.12)
- [https://docs.github.com/en/enterprise-server@3.18/admin/release-notes\#3.18.6](https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.6)
- [https://docs.github.com/en/enterprise-server@3.19/admin/release-notes\#3.19.3](https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.3)

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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-2026-3306 · Markdown: https://rewindex.com/cve/CVE-2026-3306.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-3306 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:03:59.810Z