CVE-2026-52842
CriticalCVSS 9.3Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
A vulnerability in Lightpanda before version 0.3.1 allows bypassing the Same-Origin Policy by incorrectly parsing the @ character in URLs. An attacker can craft a URL like http://attacker.com/@victim.com/, which is fetched from attacker.com but treated as originating from victim.com.
Risk Assessment
The risk involves potential cross-origin attacks such as data theft, impersonation of trusted domains, or unauthorized operations in the context of another website.
Recommendation
Immediately update Lightpanda to version 0.3.1 or later, which includes a fix for this vulnerability.
Original NVD description (English source)
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.