Description
Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via the team threads API.. Mattermost Advisory ID: MMSA-2026-00682
CVSS 3.5EPSS 0.159%Risk 0.36
View source- Published
- 2026-08-17 23:16:52
- Affected versions
- >=10.11.0,<=10.11.20,>=11.7.0,<=11.7.5
- Type
- Web application
- Last modified
- 2026-08-19 13:14:34
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N