CVEvulnerability

CVE-2026-6689

4.3 MEDIUM Published 2026-06-12 Modified 2026-06-18 Official page ↗
Status
Analyzed
Published
2026-06-12
Last modified
2026-06-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-862

Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/patch), which allows an authenticated user holding PermissionCreateTeam but not PermissionInviteUser on the resulting team to configure invite-controlled team settings (make the team publicly joinable via open invite and/or constrain membership via allowed domains) that they are not permitted to set on an existing team via POST /api/v4/teams with allow_open_invite: true and/or a non-empty allowed_domains in the request body.. Mattermost Advisory ID: MMSA-2026-00655

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.17) • mattermost mattermost server (>= 11.5.0 < 11.5.5) • mattermost mattermost server (>= 11.6.0 < 11.6.2)

Related

Weakness · CWE (1)

  • CWE-862 Missing Authorization weakness

References