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CVE-2026-15007— Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via deeply nested YAML in release notes configuration

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公司的一款一座企业级代码托管服务器。 GitHub Enterprise Server 3.22之前版本存在资源管理错误漏洞，该漏洞源于解析发布说明配置文件时未限制嵌套深度，可能导致资源过度消耗，使实例无响应。以下版本受到影响：3.17.0版本至3.17.17版本、3.18.0版本至3.18.11版本、3.19.0版本至3.19.8版本、3.20.0版本至3.20.4版本和3.21.0版本至3.21.2版本。

AI Predicted 5.3 Difficulty: Easy EPSS 0.64% · P48

Affected Version Matrix 5

VendorProduct Version RangeStatus
GitHub Enterprise Server 3.17.0≤ 3.17.17 affected
3.18.0≤ 3.18.11 affected
3.19.0≤ 3.19.8 affected
3.20.0≤ 3.20.4 affected
3.21.0≤ 3.21.2 affected
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I. Basic Information for CVE-2026-15007

Vulnerability Information
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Vulnerability Title
Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via deeply nested YAML in release notes configuration
Source: CVE Program / CVE List V5
Vulnerability Description
A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to cause service disruption by supplying a repository release notes configuration file containing deeply nested YAML. When release notes were generated, the configuration file was parsed without a nesting depth limit, causing excessive resource consumption that could render the instance unresponsive. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3. This vulnerability was reported via the GitHub Bug Bounty program.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
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公司的一款一座企业级代码托管服务器。 GitHub Enterprise Server 3.22之前版本存在资源管理错误漏洞，该漏洞源于解析发布说明配置文件时未限制嵌套深度，可能导致资源过度消耗，使实例无响应。以下版本受到影响：3.17.0版本至3.17.17版本、3.18.0版本至3.18.11版本、3.19.0版本至3.19.8版本、3.20.0版本至3.20.4版本和3.21.0版本至3.21.2版本。
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 ~ 3.17.17 -

II. Public POCs for CVE-2026-15007

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III. Intelligence Information for CVE-2026-15007

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Same Patch Batch · GitHub · 2026-07-17 · 4 CVEs total

CVE-2026-54163 4.7 MEDIUM secure_headers: CSP directive injection via sandbox, plugin_types, and report_to when give
CVE-2026-15343 Path traversal vulnerability in GitHub Enterprise Server allowed writing files to arbitrar
CVE-2026-15783 Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowe

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-770

V. Comments for CVE-2026-15007

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