CVE-2026-5512— Improper authorization vulnerability in GitHub Enterprise Server allowed disclosure of private repository names via mobile upload policy API
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I. Basic Information for CVE-2026-5512
Vulnerability Information
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Vulnerability Title
Improper authorization vulnerability in GitHub Enterprise Server allowed disclosure of private repository names via mobile upload policy API
Source: NVD (National Vulnerability Database)
Vulnerability Description
An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of private repositories by their numeric ID. The mobile upload policy API endpoint did not perform an early authorization check, and validation error messages included the full repository name for repositories the caller did not have access to. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过发送数据的信息暴露
Source: NVD (National Vulnerability Database)
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 3.21之前版本存在安全漏洞，该漏洞源于移动上传策略API端点授权不当，可能导致经过身份验证的攻击者通过数字ID确定私有仓库名称。
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 ~ 3.14.25 | - |
II. Public POCs for CVE-2026-5512
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|---|
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Same Patch Batch · GitHub · 2026-04-21 · 6 CVEs total
| CVE-2026-3307 | Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cr | |
| CVE-2026-4821 | Proxy configuration command injection vulnerability found in GitHub Enterprise Server Mana | |
| CVE-2026-4296 | Incorrect Regular Expression vulnerability in GitHub Enterprise Server allowed unauthorize | |
| CVE-2026-5921 | Server-Side Request Forgery in GitHub Enterprise Server allowed extraction of sensitive en | |
| CVE-2026-5845 | Improper authorization fallback allows scoped user-to-server token installation escape in |
IV. Related Vulnerabilities
Same product: Enterprise Server
- CVE-2026-8106
Reflected HTML injection vulnerability in GitHub Enterprise - CVE-2026-8034
Server-side request forgery vulnerability in GitHub Enterpri - CVE-2026-7541
Denial of service vulnerability in GitHub Enterprise Server - CVE-2026-6736
Authentication bypass vulnerability in GitHub Enterprise Ser - CVE-2026-5845
Improper authorization fallback allows scoped user-to-server
Same vendor: GitHub
- CVE-2026-8106
Reflected HTML injection vulnerability in GitHub Enterprise - CVE-2026-8034
Server-side request forgery vulnerability in GitHub Enterpri - CVE-2026-7541
Denial of service vulnerability in GitHub Enterprise Server - CVE-2026-6736
Authentication bypass vulnerability in GitHub Enterprise Ser - CVE-2026-5845
Improper authorization fallback allows scoped user-to-server
Same weakness: CWE-201
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V. Comments for CVE-2026-5512
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