VDB
CVE-2026-2456
CVE-2026-2456
PUBLISHED
CVSS 5.300000190734863 MEDIUM
Mattermost fails to limit the size of responses from integration action endpoints
EPSS 0.05% · 15.4th percentile
Risk Scores
CVSS 3.1
5.300000190734863
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS Score
0.05%
15.4th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost-server | 11.2.0-rc1, 10.11.0-rc1, 0 |
| Mattermost | Mattermost | 10.11.0, 11.3.0, 11.3.1 |
| mattermost | mattermost_server | 11.2.0, 11.3.0, 11.2.0 |
| github.com | mattermost/mattermost/server/v8 | 0, 0, 0 |
Exploit Intelligence
- CIRCL seen: CVE-2026-24458 (circl-sighting)
- CIRCL seen: CVE-2026-24458 (circl-sighting)
- CIRCL seen: CVE-2026-2456 (circl-sighting)
- MMSA-2026-00571 (circl)
- CVE-2026-2456.yml (github-poc)
- CVE-2026-2456.yml (github-poc)
- CVE-2026-2456.yml (github-poc)
- CVE-2026-2456.yml (github-poc)
- CVE-2026-2456.yml (github-poc)
- CVE-2026-2456.yml (github-poc)
Timeline
- Feb 16, 2026 CVE Published
- Feb 16, 2026 PoC Published
- Mar 16, 2026 EPSS Score
- Mar 17, 2026 CVE Updated
- Mar 17, 2026 EPSS Score
- Mar 18, 2026 EPSS Score
- Mar 18, 2026 PoC Published
- Mar 19, 2026 EPSS Score
- Mar 20, 2026 EPSS Score
- Mar 21, 2026 EPSS Score
- Mar 22, 2026 EPSS Score
- Mar 22, 2026 Coalition ESS Score