LOW
CVE-2026-3472
CWE-693Published: June 26, 2026· Updated: Jun 29, 2026
3.5
CVSS v3.1
EPSS:0.19%probability of exploitation in 30 daysPercentile:8.8th
Official 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
Technical Analysis
CVE-2026-3472 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Affected Vendors & Products
mattermost1 product
mattermost server
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (1)
→
https://mattermost.com/security-updatesVendor Advisory
Quick Facts
CVE IDCVE-2026-3472
CVSS Score3.5 / 10
SeverityLOW
WeaknessCWE-693
CISA KEVNo
EPSS (30d)0.19%
Affected1 vendor
PublishedJun 26, 2026
Related CVEs (CWE-693)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-3472 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.