CVE-2026-52842

CriticalCVSS 9.3/10Last modified Oct 24, 2026

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.

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-346

Affected software

No affected versions have been published.

Timeline

Published: Jul 15, 2026
Last modified: Oct 24, 2026
NVD status: Deferred

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