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

Quick assessment

Affected
GitHub Enterprise Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitHub Enterprise Server是美国GitHub开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server存在安全漏洞，该漏洞源于授权不当，可能导致具有仓库读取权限和项目写入权限的用户通过项目修改问题和拉取请求元数据。

AI Predicted 4.4 Difficulty: Moderate EPSS 0.32% · P25

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-3306

Vulnerability Information
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Vulnerability Title
Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitHub Enterprise Server是美国GitHub开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server存在安全漏洞，该漏洞源于授权不当，可能导致具有仓库读取权限和项目写入权限的用户通过项目修改问题和拉取请求元数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitHub Enterprise Server 3.14.0 ~ 3.14.23 -

II. Public POCs for CVE-2026-3306

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III. Intelligence Information for CVE-2026-3306

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Vendor Pages for CVE-2026-3306 (6)

Same Patch Batch · GitHub · 2026-03-10 · 4 CVEs total

CVE-2026-3854 Remote code execution via git push option injection in GitHub Enterprise Server
CVE-2026-3582 Incorrect Authorization in GitHub Enterprise Server allows access to issue and commit sear
CVE-2026-2266 Improper neutralization of input vulnerability was identified in GitHub Enterprise Server

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-639

V. Comments for CVE-2026-3306

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