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CVE-2026-9571

🗓️ 13 Jul 2026 07:50:55Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 8 Views

Deactivated Mattermost accounts can still obtain OAuth tokens via refresh tokens in legacy versions.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
Circl
CVE-2026-9571
13 Jul 202609:40
circl
Cvelist
CVE-2026-9571 Deactivated user accounts can continue to obtain valid OAuth access tokens via refresh token grant in Mattermost
13 Jul 202607:50
cvelist
EUVD
EUVD-2026-43305
13 Jul 202609:31
euvd
NVD
CVE-2026-9571
13 Jul 202609:16
nvd
Positive Technologies
PT-2026-57662
13 Jul 202600:00
ptsecurity
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.7.2",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.6.4",
        "status": "affected",
        "version": "11.6.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.19",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "version": "11.8.0",
        "status": "unaffected"
      },
      {
        "version": "11.7.3",
        "status": "unaffected"
      },
      {
        "version": "11.6.5",
        "status": "unaffected"
      },
      {
        "version": "10.11.20",
        "status": "unaffected"
      }
    ]
  }
]

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13 Jul 2026 09:16Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.15.9
8