Vulnerability Details CVE-2026-3471
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.7%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-3471
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cpe:2.3:a:mattermost:mattermost_desktop:-
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cpe:2.3:a:mattermost:mattermost_desktop:0.1.0
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cpe:2.3:a:mattermost:mattermost_desktop:0.2.0
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cpe:2.3:a:mattermost:mattermost_desktop:0.3.0
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cpe:2.3:a:mattermost:mattermost_desktop:0.4.0
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cpe:2.3:a:mattermost:mattermost_desktop:0.5.0
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cpe:2.3:a:mattermost:mattermost_desktop:0.5.1
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.0
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.1
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.2
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.3
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.4
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.5
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.6
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cpe:2.3:a:mattermost:mattermost_desktop:1.0.7
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cpe:2.3:a:mattermost:mattermost_desktop:1.1.0
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cpe:2.3:a:mattermost:mattermost_desktop:1.1.1
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cpe:2.3:a:mattermost:mattermost_desktop:1.2.0
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cpe:2.3:a:mattermost:mattermost_desktop:1.2.1
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cpe:2.3:a:mattermost:mattermost_desktop:1.3.0
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cpe:2.3:a:mattermost:mattermost_desktop:3.4.0
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cpe:2.3:a:mattermost:mattermost_desktop:3.4.1
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cpe:2.3:a:mattermost:mattermost_desktop:3.5.0
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cpe:2.3:a:mattermost:mattermost_desktop:3.6.0
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cpe:2.3:a:mattermost:mattermost_desktop:3.7.0
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cpe:2.3:a:mattermost:mattermost_desktop:3.7.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.0.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.0.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.1.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.1.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.1.2
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cpe:2.3:a:mattermost:mattermost_desktop:4.2.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.2.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.2.2
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cpe:2.3:a:mattermost:mattermost_desktop:4.2.3
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cpe:2.3:a:mattermost:mattermost_desktop:4.3.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.3.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.3.2
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cpe:2.3:a:mattermost:mattermost_desktop:4.4.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.4.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.4.2
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cpe:2.3:a:mattermost:mattermost_desktop:4.5.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.5.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.5.2
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cpe:2.3:a:mattermost:mattermost_desktop:4.5.3
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cpe:2.3:a:mattermost:mattermost_desktop:4.5.4
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cpe:2.3:a:mattermost:mattermost_desktop:4.6.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.6.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.6.2
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cpe:2.3:a:mattermost:mattermost_desktop:4.7.0
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cpe:2.3:a:mattermost:mattermost_desktop:4.7.1
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cpe:2.3:a:mattermost:mattermost_desktop:4.7.2
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cpe:2.3:a:mattermost:mattermost_desktop:5.0.0
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cpe:2.3:a:mattermost:mattermost_desktop:5.0.1
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cpe:2.3:a:mattermost:mattermost_desktop:5.0.2
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cpe:2.3:a:mattermost:mattermost_desktop:5.0.3
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cpe:2.3:a:mattermost:mattermost_desktop:5.0.4
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cpe:2.3:a:mattermost:mattermost_desktop:5.1.0
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cpe:2.3:a:mattermost:mattermost_desktop:5.1.1
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cpe:2.3:a:mattermost:mattermost_desktop:5.2.0
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cpe:2.3:a:mattermost:mattermost_desktop:5.2.1
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cpe:2.3:a:mattermost:mattermost_desktop:5.2.2
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cpe:2.3:a:mattermost:mattermost_desktop:5.3.0
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cpe:2.3:a:mattermost:mattermost_desktop:5.3.1
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cpe:2.3:a:mattermost:mattermost_desktop:5.4.0
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cpe:2.3:a:mattermost:mattermost_desktop:6.0.0
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cpe:2.3:a:mattermost:mattermost_desktop:6.0.1
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cpe:2.3:a:mattermost:mattermost_desktop:6.1.0