Description
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users via a crafted binary WebSocket message sent to the public WebSocket endpoint.. Mattermost Advisory ID: MMSA-2026-00647
CVSS 7.5EPSS 0.33999999999999997%Risque 0.77
Voir la source- Publication
- 2026-05-22 11:16:23
- Versions concernées
- <=11.6.0,<=11.5.3,<=11.4.4,<=10.11.14
- Type
- Logiciel critique
- Vecteur
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H