CVE-2026-3306

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.24	Release Notes
https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.19	Release Notes
https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.15	Release Notes
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.12	Release Notes
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.6	Release Notes
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.3	Release Notes

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::

History

No history.

Information

Published : 2026-03-10 18:19

Updated : 2026-03-12 18:46

NVD link : CVE-2026-3306

Mitre link : CVE-2026-3306

CVE.ORG link : CVE-2026-3306

JSON object : View

Products Affected

github

enterprise_server

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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