CVE-2026-3472
3.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Summary
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
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 10.11.0 <= 10.11.18 | affected |
| Mattermost | Mattermost | 11.6.0 <= 11.6.3 | affected |
| Mattermost | Mattermost | 11.5.0 <= 11.5.6 | affected |
| Mattermost | Mattermost | 11.7.0 | unaffected |
| Mattermost | Mattermost | 10.11.19 | unaffected |
| Mattermost | Mattermost | 11.6.4 | unaffected |
| Mattermost | Mattermost | 11.5.7 | unaffected |
Weaknesses
- CWE-693: CWE-693: Protection Mechanism Failure
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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