CVEvulnerability

CVE-2026-0999

4.3 MEDIUM Published 2026-02-16 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-02-16
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-303

Description

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate login method restrictions which allows an authenticated user to bypass SSO-only login requirements via userID-based authentication. Mattermost Advisory ID: MMSA-2025-00548

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.10) • mattermost mattermost server (>= 11.1.0 < 11.1.3) • mattermost mattermost server (>= 11.2.0 < 11.2.2)

Related

Weakness · CWE (1)

  • CWE-303 Incorrect Implementation of Authentication Algorithm weakness

References