CVE-2026-4054 | Mattermost up to 10.11.13/11.4.3/11.5.1/11.5.x SVG File unusual condition

A vulnerability, which was classified as problematic, has been found in Mattermost up to 10.11.13/11.4.3/11.5.1/11.5.x. Affected by this vulnerability is an unknown functionality of the component SVG File Handler. This manipulation causes improper check for unusual conditions.

The identification of this vulnerability is CVE-2026-4054. It is possible to initiate the attack remotely. There is no exploit available.

It is advisable to upgrade the affected component.