PT-2026-25812 · Mattermost · Mattermost

Joshua Rogers · Published 2026-03-16 · Updated 2026-03-16 · CVE-2026-1629

NVD

CVSS v3.1

4.3

4.3

Medium

Base vector

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

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

Fix

Weakness Enumeration

CWE-672

Related Identifiers

CVE-2026-1629

Affected Products

Mattermost

References · 2

• https://mattermost.com/security-updates · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1629 · Security Note