CVE-2026-117991 | Mozilla Firefox up to 153.5/158 Layout Text/Fonts out-of-bounds

October 27, 2026 Yanac

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 153.5/158. This issue affects some unknown processing of the component Layout Text/Fonts. Performing a manipulation results in out-of-bounds read.

This vulnerability is known as CVE-2026-117991. Remote exploitation of the attack is possible. No exploit is available.

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