CVE-2026-48801— Markdown it linkify-it 资源管理错误漏洞

linkify-it: Quadratic algorithmic complexity in LinkifyIt#match scan loop

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.1, LinkifyIt.prototype.match, the package's primary public API, has O(N²) algorithmic complexity for inputs containing many fuzzy links or emails because the JavaScript-level scan loop re-slices input and re-runs unanchored regex searches on progressively shorter tails. Any service that synchronously renders untrusted Markdown with linkify:true on a request hot path can inherit a worker-process denial of service triggerable by a tens-of-KB request body. This issue is fixed in version 5.0.1.

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CWE-1333

Markdown it linkify-it 资源管理错误漏洞

Markdown it! linkify-it是Markdown it!组织开源的一款协议解析与链接识别工具。 Markdown it linkify-it 5.0.1之前版本存在资源管理错误漏洞，该漏洞源于JavaScript级扫描循环在包含大量模糊链接或电子邮件的输入上具有O(N²)算法复杂度，可能导致同步渲染不可信Markdown的服务遭受工作进程拒绝服务攻击。

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