Description
Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to verify file deletion path which allows an admin with SAML system-console write permissions to delete arbitrary files outside the config directory from the server via the remove file endpoint.. Mattermost Advisory ID: MMSA-2026-00666
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
11.8.0 to ≤ 11.8.0affected11.7.0 to ≤ 11.7.3affected11.6.0 to ≤ 11.6.5affected10.11.0 to ≤ 10.11.20affected11.9.0unaffected11.8.1unaffected11.7.4unaffected11.6.6unaffected10.11.21unaffected