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CVE PROGRAM SOURCE RECORD3.5 Low

CVE-2026-4643

Calling window.close() from server-side content causes crash in the Mattermost Desktop App

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking {{window.close()}} in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mattermost Mattermost

Default version status: unaffected

  • 0 to ≤ 6.0.1affected
  • 0 to ≤ 5.4.13affected
  • 6.2.0unaffected
  • 6.1.1.0unaffected
  • 5.13.5.0unaffected

References