CVE-2026-1629

Discovered by AISLEPUBLISHEDCWE-672

Description

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 Base Scores

CVSS v3.1(Primary)
4.3

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

Affected Products

VendorProductVersionStatus
MattermostMattermost10.11.0affected
MattermostMattermost11.4.0unaffected
MattermostMattermost10.11.11—

Credits

  • Joshua Rogers(finder)

Solutions

Update Mattermost to versions 11.4.0, 10.11.11 or higher.

References