VULNERABILITY INTELLIGENCE

CVE-2026-9597

CVSS score5.4 MEDIUM
EPSS probability0.23%
CISA KEVNot currently listed
Published2026-07-13
Last modified2026-07-13
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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

Weakness classification

  • CWE-305: Authentication Bypass by Primary Weakness

Primary references