GHSA-93vf-569f-22cq: rhukster/dom-sanitizer: SVG <style> tag allows CSS injection via unfiltered url() and @import directives

DOMSanitizer::sanitize() allows elements in SVG content but never inspects their text content. CSS url() references and @import rules pass through unfiltered, causing the browser to issue HTTP requests to attacker-controlled hosts when the sanitized SVG is rendered.