CVEvulnerability

CVE-2026-6961

7.6 HIGH Published 2026-06-12 Modified 2026-06-18 Official page ↗
Status
Analyzed
Published
2026-06-12
Last modified
2026-06-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.6 HIGH — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L
Weaknesses
CWE-22

Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync, which allows an attacker who controls a federated server to write files to arbitrary locations within the target server's filestore via path traversal sequences in the filename field.. Mattermost Advisory ID: MMSA-2026-00661

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.17) • mattermost mattermost server (>= 11.5.0 < 11.5.5) • mattermost mattermost server (>= 11.6.0 < 11.6.2)

Related

Weakness · CWE (1)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References