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Change History

{"timestamp":"2026-07-15T16:35:12.169514Z","id":"CVE-2026-52842","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

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.

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CWE-346

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

[{"vendor":"lightpanda-io","product":"browser","versions":[{"version":"< 0.3.1","status":"affected"}]}]