CVE-2026-4691 | Mozilla Firefox up to 148 CSS Parser use after free

A vulnerability was found in Mozilla Firefox up to 148. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component CSS Parser. Performing a manipulation results in use after free.

This vulnerability is reported as CVE-2026-4691. The attack is possible to be carried out remotely. No exploit exists.

Upgrading the affected component is advised.VulDB Recent EntriesRead More