Vulnerability in Lightpanda-io Browser

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…

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-52842?
CVE-2026-52842 is a critical-severity vulnerability in Lightpanda-io Browser, classified under Origin Validation Error. CVSS score: 9.3/10. Published 2026-07-15.
How severe is CVE-2026-52842?
Critical severity. CVSS v3 base score is 9.3 out of 10.