Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2026-8034— Server-side request forgery vulnerability in GitHub Enterprise Server notebook viewer via URL parser confusion

EPSS 0.04% · P13
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-8034

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Server-side request forgery vulnerability in GitHub Enterprise Server notebook viewer via URL parser confusion
Source: NVD (National Vulnerability Database)
Vulnerability Description
A server-side request forgery (SSRF) vulnerability was identified in the GitHub Enterprise Server notebook viewer that allowed an attacker to access internal services by exploiting URL parser confusion between the validation layer and the HTTP request library. The hostname validation used a different URL parser than the request library, enabling a crafted URL to pass validation while directing the request to an unintended host. Exploitation required network access to the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.16.18, 3.17.15, 3.18.9, 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
服务端请求伪造(SSRF)
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URL解析器混淆，可能导致服务器端请求伪造攻击，允许攻击者访问内部服务。
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 3.16.0 ~ 3.16.17 -

II. Public POCs for CVE-2026-8034

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-8034

请登录查看更多情报信息。

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-2026-8106Reflected HTML injection vulnerability in GitHub Enterprise Server Management Console logi

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-918

V. Comments for CVE-2026-8034

No comments yet

Leave a comment