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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-15996— Denial of service vulnerability in GitHub Enterprise Server allowed unauthenticated service disruption via deeply nested request parameters

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公司的一款企业级服务器操作系统。 GitHub Enterprise Server 3.21之前版本存在资源管理错误漏洞，该漏洞源于在路由和身份验证之前解析请求参数，攻击者通过发送包含深度嵌套参数的特制表单编码HTTP POST请求，导致CPU消耗过高并耗尽请求处理worker进程池，可能使实例无响应。

CVSS 6.6 · Medium EPSS 0.77% · P54

Affected Version Matrix 4

VendorProduct Version RangeStatus
GitHub Enterprise Server 3.17.0≤ 3.17.15 affected
3.18.0≤ 3.18.9 affected
3.19.0≤ 3.19.6 affected
3.20.0≤ 3.20.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-15996

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Denial of service vulnerability in GitHub Enterprise Server allowed unauthenticated service disruption via deeply nested request parameters
Source: CVE Program / CVE List V5
Vulnerability Description
A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause excessive CPU consumption and exhaust the pool of request-handling worker processes by sending a crafted form-encoded HTTP POST request containing deeply nested parameters. Because request parameters were parsed before routing and authentication, any POST endpoint could be used to trigger the condition, which could render the instance unresponsive. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.3, 3.19.7, 3.18.10, and 3.17.16.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitHub Enterprise Server是美国GitHub公司的一款企业级服务器操作系统。 GitHub Enterprise Server 3.21之前版本存在资源管理错误漏洞，该漏洞源于在路由和身份验证之前解析请求参数，攻击者通过发送包含深度嵌套参数的特制表单编码HTTP POST请求，导致CPU消耗过高并耗尽请求处理worker进程池，可能使实例无响应。
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 3.17.0 ~ 3.17.15 -

II. Public POCs for CVE-2026-15996

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-15996

请登录查看更多情报信息。

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-674

V. Comments for CVE-2026-15996

No comments yet

Leave a comment