CVE-2026-118021 | Mozilla Firefox up to 158 XPCOM use after free

October 27, 2026 Yanac

A vulnerability categorized as critical has been discovered in Mozilla Firefox up to 158. This vulnerability affects unknown code of the component XPCOM. The manipulation results in use after free.

This vulnerability is identified as CVE-2026-118021. The attack can be executed remotely. There is not any exploit available.

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