CVE Watch29 de out. de 2026

CVE-2026-18799

Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to restrict Slack import account binding t

CVSS

4.3

Média

EPSS

0.2%

p10

KEV

—

Exploit Today

0-100

Publicado: 16 de out. de 2026 · Última mod.: 29 de out. de 2026 · CWE-862

EPSS · 30d

0.2%EPSS · 30 dias0.2%

2026-10-162026-11-06

Descrição técnica

Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team and forge posts attributed to those users' identities via a crafted Slack export containing target users' email addresses.. Mattermost Advisory ID: MMSA-2026-00757

Referências oficiais

mattermost.comhttps://mattermost.com/security-updates

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