CVE-2026-52842

Description

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.

CVSS Vector

References

• https://github.com/lightpanda-io/browser/commit/0588cc374d4af9687cf6f45a7d52f7af04bbacfb
• https://github.com/lightpanda-io/browser/pull/1998
• https://github.com/lightpanda-io/browser/releases/tag/0.3.1
• https://github.com/lightpanda-io/browser/security/advisories/GHSA-mq6p-m9cc-q432