VDB
CVE-2026-2455
CVE-2026-2455
PUBLISHED
CVSS 4.300000190734863 MEDIUM
Mattermost fails to canonicalize IPv4-mapped IPv6 addresses before reserved IP validation
EPSS 0.04% · 12.3th percentile
Risk Scores
CVSS 3.1
4.300000190734863
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.04%
12.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 11.2.0, 11.3.1, 11.2.3 |
| mattermost | mattermost_server | 10.11.0, 11.2.0, 10.11.0 |
| github.com | mattermost/mattermost-server | 10.11.0-rc1, 11.2.0-rc1, 11.3.0-rc1 |
| github.com | mattermost/mattermost/server/v8 | 0, 0 |
Exploit Intelligence
- MMSA-2026-00585 (circl)
Timeline
- Mar 16, 2026 CVE Published
- Mar 17, 2026 EPSS Score
- Mar 18, 2026 EPSS Score
- Mar 18, 2026 CVE Updated
- Mar 19, 2026 EPSS Score
- Mar 19, 2026 Security Advisory
- Mar 20, 2026 EPSS Score
- Mar 21, 2026 EPSS Score
- Mar 22, 2026 EPSS Score
- Mar 22, 2026 Coalition ESS Score
- Mar 23, 2026 EPSS Score
- Mar 24, 2026 EPSS Score