sveltejs — Vulnerabilities & Security Advisories 22

SvelteJS is a compiler-based JavaScript framework designed to build user interfaces by shifting work from runtime to build time, primarily targeting web application development. With twenty-two recorded Common Vulnerabilities and Exposures, its security profile reflects typical web framework risks rather than unique architectural flaws. Historically, reported issues have predominantly involved Cross-Site Scripting (XSS) stemming from improper input sanitization or unsafe rendering practices, alongside occasional server-side request forgery and information disclosure vulnerabilities. Unlike traditional frameworks, SvelteJS does not include a built-in runtime DOM, which inherently reduces certain client-side attack surfaces but shifts responsibility for secure coding practices directly to the developer. No major, widespread incidents have defined its history, though the accumulation of CVEs highlights the necessity for rigorous dependency management and code review. The framework’s security posture remains dependent on the implementation quality of individual projects rather than inherent framework weaknesses.