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NVD description
decode-uri-component provides a more robust alternative to decodeURIComponent. Prior to 0.5.1, decodeUriComponent in index.js falls back to customDecodeURIComponent after native decoding throws, and the fallback collects every distinct percent-encoded run before performing a full-string regular-expression replacement for each entry. Malformed input containing many distinct runs can therefore make both the number of replacements and the scanned input length grow together, causing quadratic CPU consumption and blocking the Node.js event loop; request-body inputs can reach the demonstrated size, while ordinary URL header limits reduce the practical delay. This issue is fixed in version 0.5.1.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
🚨 decode-uri-component (35 millones de descargas por semana en npm) tiene un DoS de severidad alta que puede congelar tu servidor Node.js. CVE-2026-118664, CVSS 4.0: 8.2. Afecta hasta 0.5.0, corregido en 0.5.1. Un body de unos 224 KB bloquea el event loop cerca de 20 s. https://t.co/sZQua8CGX7