Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to set permissions on downloaded bulk export which allows other local users on the server to be able to read contents of the bulk export. Mattermost Advisory ID: MMSA-2026-00593.
{
"cwe_ids": [
"CWE-732"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-31T23:04:51Z",
"nvd_published_at": "2026-03-26T17:16:42Z",
"severity": "MODERATE"
}