Product Detail
MATTERMOST SERVER
https://mattermost.com/download/#server
Product Intelligence
Public Exploit/PoC Code :
12
CISA Actively Exploited :
0
Last Vulnerability Seen :
May. 21, 2026
Vulnerabilities
The following vulnerabilities are recorded
MATTERMOST SERVER product. You can click on the
vulnerability to view more details.
| Number | Published | CVE ID | Severity | CVSS Score | |
|---|---|---|---|---|---|
| 1 | May 21, 2026 | CVE-2026-4858 | CRITICAL |
9.9
|
|
| 2 | May 21, 2026 | CVE-2026-4055 | MEDIUM |
4.3
|
|
| 3 | May 18, 2026 | CVE-2026-6347 | HIGH |
7.6
|
|
| 4 | May 18, 2026 | CVE-2026-6346 | HIGH |
8.7
|
|
| 5 | May 18, 2026 | CVE-2026-6345 | MEDIUM |
6.5
|
|
| 6 | May 18, 2026 | CVE-2026-6343 | MEDIUM |
4.3
|
|
| 7 | May 18, 2026 | CVE-2026-6339 | MEDIUM |
4.3
|
|
| 8 | May 18, 2026 | CVE-2026-6333 | MEDIUM |
5.0
|
|
| 9 | May 18, 2026 | CVE-2026-5163 | MEDIUM |
6.5
|
|
| 10 | May 18, 2026 | CVE-2026-4286 | MEDIUM |
4.3
|
|
| 11 | May 18, 2026 | CVE-2026-28732 | MEDIUM |
4.3
|
|
| 12 | May 18, 2026 | CVE-2026-6340 | MEDIUM |
6.5
|
|
| 13 | May 18, 2026 | CVE-2026-4273 | MEDIUM |
4.3
|
|
| 14 | May 18, 2026 | CVE-2026-3637 | MEDIUM |
4.3
|
|
| 15 | May 18, 2026 | CVE-2026-3495 | MEDIUM |
4.8
|
|
| 16 | May 18, 2026 | CVE-2026-2325 | MEDIUM |
6.5
|
|
| 17 | May 18, 2026 | CVE-2026-28759 | MEDIUM |
4.3
|
|
| 18 | May 15, 2026 | CVE-2026-4054 | MEDIUM |
6.5
|
|
| 19 | May 15, 2026 | CVE-2026-4053 | MEDIUM |
4.3
|
|
| 20 | Apr 15, 2026 | CVE-2026-3590 | MEDIUM |
6.5
|