CVE-2026-3472

LowCVSS 3.5/10Last modified Jun 29, 2026

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

Metrics

CVSS 3.1 3.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-693

Affected software

No affected versions have been published.

Timeline

Published: Jun 26, 2026
Last modified: Jun 29, 2026
NVD status: Analyzed

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