VDB
CVE-2026-9693
CVE-2026-9693
PUBLISHED
CVSS 3.5 LOW
Reported by Mattermost · Published August 17, 2026
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
Risk Scores
CVSS 3.1
3.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.11.0, 11.7.0, 11.9.0 |
| Mattermost | Mattermost | 10.11.0, 11.7.0, 11.9.0 |
Timeline
- Aug 17, 2026 CVE Published
- Aug 18, 2026 Coalition ESS Score
- Aug 19, 2026 CVE Updated
- Aug 24, 2026 EPSS Score
- Aug 27, 2026 EPSS Score
- Sep 5, 2026 Security Advisory
References
- MMSA-2026-00682 vendor-advisory