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
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://mattermost.com/security-updates |
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History
Mon, 18 May 2026 15:30:00 +0000
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ssvc
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Mon, 18 May 2026 10:45:00 +0000
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Mattermost
Mattermost mattermost |
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| Vendors & Products |
Mattermost
Mattermost mattermost |
Mon, 18 May 2026 09:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 | |
| Title | Opening a window with {{javascript:alert()}} as URL causes crash in the Mattermost Desktop App | |
| Weaknesses | CWE-939 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published: 2026-05-18T08:45:44.576Z
Updated: 2026-05-18T14:35:23.933Z
Reserved: 2026-03-03T10:41:41.370Z
Link: CVE-2026-3471
Updated: 2026-05-18T14:34:54.906Z
Status : Undergoing Analysis
Published: 2026-05-18T09:16:22.847
Modified: 2026-05-18T17:32:38.127
Link: CVE-2026-3471
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