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CVE-2026-8106— Reflected HTML injection vulnerability in GitHub Enterprise Server Management Console login page allowed credential theft

EPSS 0.05% · P15
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I. Basic Information for CVE-2026-8106

Vulnerability Information
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Vulnerability Title
Reflected HTML injection vulnerability in GitHub Enterprise Server Management Console login page allowed credential theft
Source: NVD (National Vulnerability Database)
Vulnerability Description
A reflected HTML injection vulnerability was identified in the GitHub Enterprise Server Management Console login page that could allow credential theft. The redirect_to query parameter on the /setup/unlock endpoint was reflected into an HTML attribute without proper sanitization, enabling an attacker to inject a form element that could capture administrator credentials. Exploitation required an administrator to click a crafted link and enter their credentials. This vulnerability affected GitHub Enterprise Server versions 3.19.1 through 3.19.5 and 3.20.0 through 3.20.1, and was fixed in versions 3.19.6 and 3.20.2. 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
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
GitHub Enterprise Server 跨站脚本漏洞
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 3.19.1版本至3.19.5版本和3.20.0版本至3.20.1版本存在跨站脚本漏洞，该漏洞源于管理控制台登录页面中redirect_to参数反射到HTML属性且清理不当，可能导致反射型HTML注入攻击，进而窃取凭据。
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

VendorProductAffected VersionsCPESubscribe
GitHubEnterprise Server 3.19.1 ~ 3.19.5 -

II. Public POCs for CVE-2026-8106

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III. Intelligence Information for CVE-2026-8106

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Same Patch Batch · GitHub · 2026-05-07 · 4 CVEs total

CVE-2026-6736Authentication bypass vulnerability in GitHub Enterprise Server allowed creation of local
CVE-2026-7541Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via
CVE-2026-8034Server-side request forgery vulnerability in GitHub Enterprise Server notebook viewer via

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-79

V. Comments for CVE-2026-8106

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