VDB
CVE-2026-16044
CVE-2026-16044
PUBLISHED
CVSS 3.9 LOW
Reported by Mattermost · Published August 17, 2026
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00672
Risk Scores
CVSS 3.1
3.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 11.7.0, 10.11.0, 11.9.0 |
| Mattermost | Mattermost | 11.7.0, 10.11.0, 11.9.0 |
Timeline
- Aug 17, 2026 CVE Published
- Aug 17, 2026 CVE Updated
- Aug 22, 2026 Coalition ESS Score
- Aug 24, 2026 EPSS Score
- Sep 1, 2026 EPSS Score
References
- MMSA-2026-00672 vendor-advisory