CVE-2026-14259

—

CVSS 3.1

4.3 medium

EPSS

—

Published

Sep 14, 2026 (1d ago)

Modified

Sep 14, 2026

Description

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to enforce board creation permissions when importing archive files which allows an authenticated non-guest team member to create Open or Private boards despite administrator restrictions via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00712

Weakness: CWE-862
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (—)

In the news0 stories

No ingested article mentions this CVE yet.