CVE-2026-4691 | Mozilla Firefox up to 148 CSS Parser use after free (Nessus ID 304234 / WID-SEC-2026-0850)
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.