CVE-2026-9597 in Mattermost

Sumário

de MITRE • 13/07/2026

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

• Responsável: Mattermost
• Reservar: 26/05/2026
• Divulgação: 13/07/2026
• Moderação: aceite
• Entrada: VDB-377932
• CPE: pronto
• CWE: Desconhecido
• CVSS: 4.3 (VulDB)
• EPSS: 0.00000
• KEV: não
• Atividades: baixo
• Sector: Pharma, Homeoffice, ...

Fontes

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-9597
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9597
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-9597/