Low 3.8Published Oct 26, 2026

CVE-2026-93846Team admin can escalate a team member's permissions via the team member roles endpoint

Updated under an hour ago (Oct 30, 2026, 3:40 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Mattermost versions 11.7.x <= 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission scheme via the {{update-team-member-roles}} REST API.. Mattermost Advisory ID: MMSA-2026-00734

CVSS: 3.8 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Mattermost
NVD analysis: Awaiting Analysis
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

Mattermost Mattermost mattermost:mattermost (from the name)	from 11.7.0 through 11.7.10; 11.11.0 not affected; 11.7.11 not affected	CNA record

References

References

https://mattermost.com/security-updates	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.