Search/CVE-2026-3471
● CVE — Medium

CVE-2026-3471

VendormattermostProductmattermost desktopDiscoveredMay 18, 2026UpdatedJun 5, 2026

Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent an invalid URL from loading in a pop-up window in the Mattermost Desktop App which allows a malicious server owner to repeated crash the application via calling {{window.open('javascript:alert()');}}. Mattermost Advisory ID: MMSA-2026-00618

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CVSS v3.1
6.5 MEDIUM
EPSS
0.18%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 26, 2026
● 0.00pp
0.18% → 0.18% over 3 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionREQUIRED
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Connections
2 relationships
Timeline
disclosure → media coverage
May 18, 2026
Disclosure — published as a CVE record. · last revised by NVD Jun 5, 2026