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CVE-2026-9597

nvd nist
Published: Jul 13, 2026Modified: Jul 13, 2026

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5.4
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Exploitability: 2.8 / Impact: 2.5
Source: responsibledisclosure@mattermost.com (Secondary)

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

Affected (2)

Mattermost
1 product
Mattermost Server
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Mattermost
Mattermost Server
From 11.6.0 to 11.6.5
Mattermost Server
From 11.7.0 to 11.7.3

Related CWEs

CWE-305
Authentication Bypass by Primary Weakness
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

References (1)

Source: responsibledisclosure@mattermost.com
Vendor Advisory

Timeline

No history available yet.