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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-8075

Posting a malicious markdown image crashes the Mattermost Desktop App

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermost Advisory ID: MMSA-2026-00668

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
  • 0 to ≤ 6.0.2affected
  • 6.3.0unaffected
  • 5.13.6.0unaffected
  • 6.2.1.0unaffected

References