A vulnerability was found in Mattermost up to 10.11.14/11.4.4/11.5.2/11.5.3/11.6.0 . It has been declared as problematic . This issue affects some unknown processing of the component TIFF IFD Offset Handler . Executing a manipulation can lead to resource consumption. This vulnerability is tracked as CVE-2026-5755 . The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.