VDB
CVE-2026-26230
CVE-2026-26230
PUBLISHED
CVSS 3.799999952316284 LOW
Mattermost versions 10.11.x <= 10.11.10 fail to properly validate permission requirements in the team member roles API endpoint which allows team administrators to demote members to guest role. Mattermost Advisory ID: MMSA-2025-00531
EPSS 0.04% · 11.3th percentile
Risk Scores
CVSS 3.1
3.799999952316284
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
EPSS Score
0.04%
11.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.11.0, 11.4.0, 10.11.11 |
| mattermost | mattermost_server | 10.11.0, 10.11.0, 10.11.0 |
Exploit Intelligence
- MMSA-2025-00531 (circl)
Timeline
- Mar 16, 2026 CVE Published
- Mar 17, 2026 EPSS Score
- Mar 17, 2026 CVE Updated
- Mar 18, 2026 EPSS Score
- 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
- Mar 23, 2026 EPSS Score
- Mar 24, 2026 EPSS Score
- Mar 25, 2026 EPSS Score
References
- MMSA-2025-00531 vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-26230 advisory