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CVE PROGRAM SOURCE RECORD8.0 High

CVE-2026-4858

Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action URL.. Mattermost Advisory ID: MMSA-2026-00640

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

  • 11.6.0 to ≤ 11.6.0affected
  • 11.5.0 to ≤ 11.5.3affected
  • 11.4.0 to ≤ 11.4.4affected
  • 10.11.0 to ≤ 10.11.14affected
  • 11.7.0unaffected
  • 11.6.1unaffected
  • 11.5.4unaffected
  • 11.4.5unaffected
  • 10.11.15unaffected

References