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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-8683

Overly long URLs crash the Mattermost Desktop App

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application via including a script to call window.open on a very large URL. Mattermost Advisory ID: MMSA-2026-00652

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 ≤ 5.5.13affected
  • 6.2.0unaffected
  • 5.13.6.0unaffected

References