Definition ∞ A JavaScript runtime exploit is a malicious code sequence that takes advantage of vulnerabilities within a JavaScript execution environment. These exploits target flaws in web browsers, Node.js, or other platforms where JavaScript code runs. Successful execution can lead to arbitrary code execution, data theft, or system compromise. They often leverage memory corruption bugs or logic errors.
Context ∞ In the Web3 and digital asset space, JavaScript runtime exploits pose a severe threat, particularly for browser-based crypto wallets and decentralized applications. A successful exploit can allow an attacker to bypass security measures, steal private keys, or manipulate transactions. News often reports on critical vulnerabilities discovered in popular JavaScript libraries or browser engines, emphasizing the continuous need for vigilant security patching and robust client-side protection.
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