PT-2026-52721 · Mattermost · Mattermost
Juho Forsén
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Published
2026-06-26
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Updated
2026-06-26
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CVE-2026-3472
CVSS v3.1
3.5
Low
| Vector | AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N |
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
Fix
Protection Mechanism Failure
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Weakness Enumeration
Related Identifiers
Affected Products
Mattermost