Risk Scores
CVSS v3.1
3.0999999046325684
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.01%
1.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| mattermost | mattermost_server | 10.11.0 |
| Mattermost | Mattermost | 10.11.0, 10.11.10, 11.3.0 |
| github.com | mattermost/mattermost-server | 10.11.0 |
Timeline
- Jan 16, 2026 CVE Published
- Feb 13, 2026 EPSS Score
- Feb 14, 2026 EPSS Score
- Feb 14, 2026 PoC Published
- Feb 16, 2026 EPSS Score
- Feb 17, 2026 EPSS Score
- Feb 19, 2026 EPSS Score
- Feb 20, 2026 EPSS Score
- Feb 21, 2026 EPSS Score
- Feb 23, 2026 EPSS Score
- Feb 24, 2026 EPSS Score
- Feb 25, 2026 EPSS Score
References
- https://mattermost.com/security-updates/ advisory
- MMSA-2025-00549 vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-20796 advisory
- https://github.com/mattermost/mattermost package