CVE-2026-16048

EUVD-2026-60206
Mattermost versions 11.8.x <= 11.8.2, 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to restrict channel member role assignment to channel-scoped roles which allows a channel administrator to gain additional channel permissions via the channel member roles API.. Mattermost Advisory ID: MMSA-2026-00697
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
MattermostCNA
6.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mattermostmattermost
11.8.0 ≤
𝑥
≤ 11.8.2
CNA
mattermostmattermost
11.7.0 ≤
𝑥
≤ 11.7.6
CNA
mattermostmattermost
10.11.0 ≤
𝑥
≤ 10.11.21
CNA
Common Weakness Enumeration
References
https://mattermost.com/security-updates