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EUVD-2026-38276

🗓️ 22 Jun 2026 13:41:28Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 4 Views

Mattermost bot target validation flaw lets a low-privilege admin degrade any bot via the demote-user API.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-8823
22 Jun 202613:41
attackerkb
CVE
CVE-2026-8823
22 Jun 202613:41
cve
Cvelist
CVE-2026-8823 User Manager can demote bot accounts to guest without bot-management permission
22 Jun 202613:41
cvelist
NVD
CVE-2026-8823
22 Jun 202616:16
nvd
Positive Technologies
PT-2026-51345
22 Jun 202600:00
ptsecurity
Vulnrichment
CVE-2026-8823 User Manager can demote bot accounts to guest without bot-management permission
22 Jun 202613:41
vulnrichment
[
  {
    "enisaIdVendor": [
      {
        "id": "ef4cfb8e-b60c-35aa-85d6-18702262a187",
        "vendor": {
          "name": "Mattermost"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "b31aaadd-dea0-33f9-8e90-b10113f7b5d5",
        "product": {
          "name": "Mattermost",
          "vendor": {
            "name": "Mattermost"
          }
        },
        "product_version": "10.11.0 ≤10.11.17"
      },
      {
        "id": "f60f98f3-372f-31d9-aea2-4c40da4170ed",
        "product": {
          "name": "Mattermost",
          "vendor": {
            "name": "Mattermost"
          }
        },
        "product_version": "11.7.0 ≤11.7.0"
      }
    ]
  }
]

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22 Jun 2026 16:12Current
6Medium risk
Vulners AI Score6
CVSS 3.13.8
SSVC
4