CVE-2026-3472

CVE-2026-3472CVE-2026-3472

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

Scoring

CVSS 3.5 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Last modified2026-06-26
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.