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CVE-2026-15754 Missing per-channel team-scope check in ABAC access control policy unassign allows cross-team policy removal

🗓️ 17 Aug 2026 14:36:56Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 8 Views

Mattermost ABAC policy unassign lets admins remove channel assignments outside their team via missing team-scope check.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-15754
17 Aug 202614:36
attackerkb
cve
CVE
CVE-2026-15754
17 Aug 202614:36
cve
euvd
EUVD
EUVD-2026-60212
17 Aug 202614:36
euvd
nvd
NVD
CVE-2026-15754
17 Aug 202615:16
nvd
ptsecurity
Positive Technologies
PT-2026-76668
17 Aug 202600:00
ptsecurity
vulnrichment
Vulnrichment
CVE-2026-15754 Missing per-channel team-scope check in ABAC access control policy unassign allows cross-team policy removal
17 Aug 202614:36
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.7.6",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.8.3",
        "status": "affected",
        "version": "11.8.0",
        "versionType": "semver"
      },
      {
        "version": "11.9.0",
        "status": "unaffected"
      },
      {
        "version": "11.7.7",
        "status": "unaffected"
      },
      {
        "version": "11.8.4",
        "status": "unaffected"
      }
    ]
  }
]

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