VDB
CVE-2026-9816
CVE-2026-9816
PUBLISHED
As of August 17, 2026, Mattermost is affected by vulnerabilities in the following product: Mattermost Prior to or equal to 10.11.21 Prior to or equal to 11.7.6 Prior to or equal to 11.8.3 The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available.
EPSS 0.26% · 17.5th percentile
Risk Scores
EPSS Score
0.26%
17.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Prior | Prior to or equal to 11.8.3 | |
| Prior | Prior to or equal to 10.11.21 | |
| Prior | Prior to or equal to 11.7.6 |
Timeline
- Aug 17, 2026 CVE Published
- Aug 18, 2026 Coalition ESS Score
- Aug 19, 2026 Security Advisory
- Aug 19, 2026 CVE Updated
- Aug 24, 2026 EPSS Score
- Aug 28, 2026 EPSS Score