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CVE-2026-82920 Mattermost ABAC parent policy bypass via policy update endpoint

🗓️ 14 Sep 2026 13:59:01Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 5 Views

Mattermost up to 11.9.0 ABAC parent policy detach allows admin to bypass authorization.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-82920
14 Sep 202613:59
cve
euvd
EUVD
EUVD-2026-77487
14 Sep 202613:59
euvd
nvd
NVD
CVE-2026-82920
14 Sep 202614:17
nvd
ptsecurity
Positive Technologies
PT-2026-91236
14 Sep 202600:00
ptsecurity
vulnrichment
Vulnrichment
CVE-2026-82920 Mattermost ABAC parent policy bypass via policy update endpoint
14 Sep 202613:59
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.9.0",
        "status": "affected",
        "version": "11.9.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.8.4",
        "status": "affected",
        "version": "11.8.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.7.7",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "version": "11.10.0",
        "status": "unaffected"
      },
      {
        "version": "11.9.1",
        "status": "unaffected"
      },
      {
        "version": "11.8.5",
        "status": "unaffected"
      },
      {
        "version": "11.7.8",
        "status": "unaffected"
      }
    ]
  }
]

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