CVE-2026-1629

Permalink Preview Information Disclosure After Permission Revocation

CVSS 4.3 MEDIUMEPSS 0.2%CWE-672

Mattermost versions 10.11.x <= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580

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

Produtos afetados

Mattermost · Mattermost

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Referências

https://mattermost.com/security-updates