{"id":"CVE-2026-93846","aliases":["EUVD-2026-109968","GHSA-39rf-335p-gqxg"],"status":"published","title":"Team admin can escalate a team member's permissions via the team member roles endpoint","description":"Mattermost versions 11.7.x \u003c= 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","severity":{"version":"3.1","score":3.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00152,"percentile":0.04458,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2026-10-26T15:58:14Z","modified":"2026-11-02T19:43:06Z","products":[{"vendor":"mattermost","product":"mattermost"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93846"},{"url":"https://github.com/advisories/GHSA-39rf-335p-gqxg"}],"sources":{"cve":[{"id":"CVE-2026-93846","title":"Team admin can escalate a team member's permissions via the team member roles endpoint","description":"Mattermost versions 11.7.x \u003c= 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","status":"published","published":"2026-10-26T15:58:14.443Z","modified":"2026-11-02T19:43:06.229Z","cvss":[{"version":"3.1","score":3.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T20:51:25.833244Z"}],"euvd":[{"id":"EUVD-2026-109968","description":"Mattermost versions 11.7.x \u003c= 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","status":"published","published":"2026-10-26T15:58:14Z","modified":"2026-11-02T19:43:06Z","cvss":[{"version":"3.1","score":3.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","level":"low"}],"updated_at":"2026-11-03T05:08:38.228652Z"}],"ghsa":[{"id":"GHSA-39rf-335p-gqxg","title":"Mattermost versions 11.7.x \u003c= 11.7.10 fail to restrict which built-in roles can be assigned to a...","description":"Mattermost versions 11.7.x \u003c= 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","status":"published","published":"2026-10-26T18:32:59Z","modified":"2026-10-26T18:33:04Z","cvss":[{"version":"3.1","score":3.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","level":"low"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:14:24.666824Z"}],"nvd":[{"id":"CVE-2026-93846","description":"Mattermost versions 11.7.x \u003c= 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","status":"published","published":"2026-10-26T16:17:23.433Z","modified":"2026-11-02T20:18:04.97Z","cvss":[{"version":"3.1","score":3.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-863"],"updated_at":"2026-11-03T00:02:35.749072Z"}]}}