Security Advisory
CVE-2026-16351
9.8
CRITICAL
Vulnerability Description
Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Published Date
July 21, 2026
Official Source
NIST NVD Advisory