CVE-2026-7521

MEDIUM

SAML certificate deletion allows path traversal to delete arbitrary files outside the config directory

Title source: cna
STIX 2.1

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

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
MMSA-2026-00666
https://mattermost.com/security-updates

Scores

CVSS v3 5.5
EPSS 0.0028
EPSS Percentile 20.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (10)
Mattermost/Mattermost 10.11.0 - 10.11.20
Mattermost/Mattermost 10.11.21
Mattermost/Mattermost 11.6.0 - 11.6.5
Mattermost/Mattermost 11.6.6
Mattermost/Mattermost 11.7.0 - 11.7.3
Mattermost/Mattermost 11.7.4
Mattermost/Mattermost 11.8.0
Mattermost/Mattermost 11.8.1
Mattermost/Mattermost 11.9.0
mattermost/mattermost_server 10.11.0 - 10.11.21
Published Jul 28, 2026
Tracked Since Jul 28, 2026