Security Advisory

CVE-2026-3472

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-26 14:42:24

Last updated 2026-06-26 15:41:09

Assigner Mattermost

CVSS score 3.5

State PUBLISHED

Description

Mattermost versions 10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x <= 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into tool result content rendered by a victim's client.. Mattermost Advisory ID: MMSA-2026-00619

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