CVE-2026-100779 | Mozilla Firefox up to 115.41/140.16/153.3/156 XSLT use after free

September 29, 2026 Yanac

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 115.41/140.16/153.3/156. This issue affects some unknown processing of the component XSLT. This manipulation causes use after free.

The identification of this vulnerability is CVE-2026-100779. It is possible to initiate the attack remotely. There is no exploit available.

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