CVE-2026-74986 | Mozilla Firefox up to 153.0 CSS Parsing/Computation isolation

August 18, 2026 Yanac

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 153.0. This issue affects some unknown processing of the component CSS Parsing/Computation. The manipulation leads to improper isolation or compartmentalization.

This vulnerability is uniquely identified as CVE-2026-74986. The attack is possible to be carried out remotely. No exploit exists.

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