CVE-2026-0999 | Mattermost up to 10.11.9/11.1.2/11.2.1 Login incorrect implementation of authentication algorithm

February 16, 2026 Yanac

A vulnerability classified as critical has been found in Mattermost up to 10.11.9/11.1.2/11.2.1. The impacted element is an unknown function of the component Login. This manipulation causes incorrect implementation of authentication algorithm.

This vulnerability is tracked as CVE-2026-0999. The attack is possible to be carried out remotely. No exploit exists.

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