CVE-2026-21388lowCWE-770

CVE-2026-21388: fallo de gravedad baja en Mattermost

Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}} Webhook Endpoint

Publicada el

Seguir esta CVE+ Monitorear Mattermost+ Monitorear github.com/mattermost/mattermost-plugin-msteams

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

8Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 3.7epss 0.3%
Mattermost Plugins versions <=2.3.1 fail to limit the request body size on the {{/lifecycle}} webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Productos afectados
Mattermost · Mattermost
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