CVE-2024-1953: Mattermost Server

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

Mattermost versions 8.1.x before 8.1.9, 9.2.x before 9.2.5, 9.3.0, and 9.4.x before 9.4.2 fail to limit the number of role names requested from the API, allowing an authenticated attacker to cause the server to run out of memory and crash by issuing an unusually large HTTP request.

Affected products

• Mattermost Mattermost Server: from 8.1.0, before 8.1.9 (fixed in 8.1.9); from 9.2.0, before 9.2.5 (fixed in 9.2.5); from 9.4.0, before 9.4.2 (fixed in 9.4.2); version 9.3.0 only

Published 2024-02-29. Last modified 2026-06-17.