fast-xml-parser affected by DoS through entity expansion in DOCTYPE (no expansion limit)

fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. In versions 4.1.3 through 5.3.5, the XML parser can be forced to do an unlimited amount of entity expansion. With a very small XML input, it’s possible to make the parser spend seconds or even minutes processing a single request, effectively freezing the application. Version 5.3.6 fixes the issue. As a workaround, avoid using DOCTYPE parsing by `processEntities: false` option.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

DTD中递归实体索引的不恰当限制(XML实体扩展)

fast-xml-parser 安全漏洞

fast-xml-parser是Natural Intelligence开源的一个库。用于在没有基于 C/C++ 的库和回调的情况下，快速验证 XML、解析 XML 和构建 XML。 fast-xml-parser 5.3.5及之前版本存在安全漏洞，该漏洞源于XML解析器可能被迫进行无限量的实体扩展，可能导致正则表达式拒绝服务。

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