CVE-2026-1629 MEDIUM

CVE-2026-1629: Permalink Preview Information Disclosure After Permission Revocation

Vendor Mattermost
Product Mattermost
Weakness CWE-672
Published March 16, 2026
Last update March 17, 2026
View on NVD All CVEs

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

March 16, 2026 CVE published
March 17, 2026 Record updated