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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-14298

Boards archive import endpoint allows resource exhaustion via zip bomb and file size limit bypass in Mattermost

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to limit decompressed content size and enforce the configured maximum file size in the Boards archive import handler, which allows an authenticated user to cause memory exhaustion or unbounded disk consumption via a crafted .boardarchive file uploaded to the import endpoint.. Mattermost Advisory ID: MMSA-2026-00713

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

  • 11.9.0 to ≤ 11.9.0affected
  • 11.8.0 to ≤ 11.8.4affected
  • 11.7.0 to ≤ 11.7.7affected
  • 10.11.0 to ≤ 10.11.22affected
  • 11.10.0unaffected
  • 11.9.1unaffected
  • 11.8.5unaffected
  • 11.7.8unaffected
  • 10.11.23unaffected

References