CVE-2026-9597
MEDIUM
NVD
CVSS Score
5.4
Severity
MEDIUM
Published
Jul 13, 2026
Vendor
unknown
Description
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4 fail to verify whether a guest account is deactivated before creating a session in the magic-link token login path, which allows a deactivated guest user to obtain a fully functional session via a magic-link token issued prior to deactivation.. Mattermost Advisory ID: MMSA-2026-00681