Bootstrap 5.1.3 Exploit Jun 2026

As of April 2026, according to security databases like Snyk .

If the developer improperly sanitized user input and allowed raw HTML in tooltips, an attacker could execute JavaScript. However, this is —it is a misconfiguration. Bootstrap requires explicit opt-in: you must set sanitize: false or misconfigure the allowList for this to work. bootstrap 5.1.3 exploit

Bootstrap’s JavaScript plugins support a sanitize option (default is true ). Ensure you have not disabled it: As of April 2026, according to security databases like Snyk