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CVE-2026-3471

Opening a window with {{javascript:alert()}} as URL causes crash in the Mattermost Desktop App PUBLISHED

Description (CNA)

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

Affected (CNA)

Vendor / productVersions
Mattermost / Mattermostaffected 0 through 6.0.1; affected 0 through 5.4.13; unaffected 6.2.0; unaffected 6.1.1.0; unaffected 5.13.5.0

CWE

CWE-939

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.