CVE-2026-0999

Authentication bypass via userID login when email and username login are disabled

CVSS 5.4 MEDIUMEPSS 0.2%CWE-303

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Produtos afetados

Mattermost · Mattermost

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Referências

https://mattermost.com/security-updates