Question 1

What is CVE-2026-16399 — CVE-2026-16399?

Accepted Answer

Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153.

Question 2

What is the authoritative source for CVE-2026-16399?

Accepted Answer

CVE-2026-16399 (CVE-2026-16399) is catalogued in NVD + CISA KEV + FIRST EPSS and curated for EU compliance use cases by SQUR.

CVE-2026-16399CVE-2026-16399

Description