CVE-2026-100811 | Mozilla Firefox up to 140.16/153.3/156 DOM Core/HTML use after free

September 29, 2026 Yanac

A vulnerability was found in Mozilla Firefox up to 140.16/153.3/156. It has been declared as critical. This issue affects some unknown processing of the component DOM Core/HTML Component. Executing a manipulation can lead to use after free.

This vulnerability is tracked as CVE-2026-100811. The attack can be launched remotely. No exploit exists.

It is recommended to upgrade the affected component.VulDB Recent EntriesRead More