ThisIsOne https://blog.hatena.ne.jp/ThisIsOne/ Shikata Ga Nai https://cysec148.hatenablog.com/ Web Security Academy Prototype pollution Hello there, ('ω')ノ 🔁 危険な関数 まず、以下の関数は「2つのオブジェクトをマージ（結合）する処理」です： function merge(target, source) { for (let key in source) { if (typeof source[key] === 'object') { if (!target[key]) target[key] = {}; merge(target[key], source[key]); } else { target[key] = source[key]; } } } ここでは target に対して source を上書… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcysec148.hatenablog.com%2Fentry%2F2025%2F09%2F17%2F055413" title="JavaScriptのプロトタイプ継承の仕組み - Shikata Ga Nai" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2025-09-17 05:54:13 rich https://cysec148.hatenablog.com/entry/2025/09/17/055413 1.0 100%