Low severity · published Oct 26, 2026
CVE-2026-93846
Team admin can escalate a team member's permissions via the team member roles endpoint
New
3.8
CVSS
0.2%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
11.7.0 through 11.7.10 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93846
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93846
mattermost.com
https://mattermost.com/security-updates
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