CVE-2026-52842

Lightpanda is a headless browser designed for AI and automation. Prior to 0.3.1, Lightpanda searched for @ across the entire URL string instead of only the authority component when computing a page origin, so a URL such as http://attacker.com/@victim.com/ was fetched from attacker.com but treated as http://victim.com, allowing a complete Same-Origin Policy bypass. This issue is fixed in version 0.3.1.