CVE-2026-7521

EUVD-2026-49852
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
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
MattermostCNA
5.5 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mattermostmattermost
𝑥
≤ 11.8.0
CNA
mattermostmattermost
11.7.0 ≤
𝑥
≤ 11.7.3
CNA
mattermostmattermost
11.6.0 ≤
𝑥
≤ 11.6.5
CNA
mattermostmattermost
10.11.0 ≤
𝑥
≤ 10.11.20
CNA
Common Weakness Enumeration
References
https://mattermost.com/security-updates