CVE-2026-5740 | Mattermost up to 10.11.14/11.4.4/11.5.3/11.6.0 msgpack-Encoded WebSocket Frame memory allocation

SecurityVulns
Yanac

A vulnerability classified as problematic was found in Mattermost up to 10.11.14/11.4.4/11.5.3/11.6.0. This impacts an unknown function of the component msgpack-Encoded WebSocket Frame Handler. Executing a manipulation can lead to uncontrolled memory allocation.

This vulnerability is handled as CVE-2026-5740. The attack can be executed remotely. There is not any exploit available.

Upgrading the affected component is advised.VulDB Recent EntriesRead More