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CVE-2026-26230 Team Admin Privilege Escalation to Demote Members to Guest

🗓️ 16 Mar 2026 20:19:51Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 20 Views

Mattermost 10.11.x to 10.11.10 fail permission checks in the team member roles API, enabling admins to demote members.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-26230
16 Mar 202620:19
attackerkb
CNNVD
Mattermost 安全漏洞
16 Mar 202600:00
cnnvd
CVE
CVE-2026-26230
16 Mar 202620:19
cve
EUVD
EUVD-2026-12518
16 Mar 202621:34
euvd
NVD
CVE-2026-26230
16 Mar 202621:16
nvd
Positive Technologies
PT-2026-25813
16 Mar 202600:00
ptsecurity
RedhatCVE
CVE-2026-26230
16 Mar 202622:19
redhatcve
Snyk
Incorrect Authorization
16 Mar 202622:46
snyk
Snyk
Incorrect Authorization
16 Mar 202622:46
snyk
Vulnrichment
CVE-2026-26230 Team Admin Privilege Escalation to Demote Members to Guest
16 Mar 202620:19
vulnrichment
Rows per page
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "10.11.10",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "version": "11.4.0",
        "status": "unaffected"
      },
      {
        "version": "10.11.11",
        "status": "unaffected"
      }
    ]
  }
]

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