CVE-2026-29074— SVGO: DoS through entity expansion in DOCTYPE (Billion Laughs)
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I. Basic Information for CVE-2026-29074
Vulnerability Information
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Vulnerability Title
SVGO: DoS through entity expansion in DOCTYPE (Billion Laughs)
Source: NVD (National Vulnerability Database)
Vulnerability Description
SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 2.1.0 to before version 2.8.1, from version 3.0.0 to before version 3.3.3, and before version 4.0.1, SVGO accepts XML with custom entities, without guards against entity expansion or recursion. This can result in a small XML file (811 bytes) stalling the application and even crashing the Node.js process with JavaScript heap out of memory. This issue has been patched in versions 2.8.1, 3.3.3, and 4.0.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
DTD中递归实体索引的不恰当限制(XML实体扩展)
Source: NVD (National Vulnerability Database)
Vulnerability Title
SVGO 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SVGO是svg开源的一个SVG文件优化工具。 SVGO 2.1.0至2.8.1之前版本、3.0.0至3.3.3之前版本和4.0.1之前版本存在安全漏洞，该漏洞源于处理XML自定义实体时未防范实体扩展，可能导致拒绝服务。
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
II. Public POCs for CVE-2026-29074
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IV. Related Vulnerabilities
Same weakness: CWE-776
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MarkUs: YAML alias (‘billion laughs’) DoS in config upload - CVE-2026-26278
fast-xml-parser affected by DoS through entity expansion in - CVE-2025-20369
Extensible Markup Language (XML) External Entity Injection (
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