CVE-2026-86349 | Mattermost up to 10.11.22/11.7.8/11.8.4/11.9.0 Markdown parser denial of service

A vulnerability, which was classified as problematic, was found in Mattermost up to 10.11.22/11.7.8/11.8.4/11.9.0. The affected element is an unknown function of the component Markdown parser. Executing a manipulation can lead to denial of service.

This vulnerability is tracked as CVE-2026-86349. The attack can be launched remotely. No exploit exists.

You should upgrade the affected component.VulDB Recent EntriesRead More