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CVE-2026-6342

🗓️ 18 May 2026 07:00:24Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 15 Views

CVE-2026-6342: Mattermost plugins allow subscriptions to groups not whitelisted by creating groups with the same prefix.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-6342
18 May 202607:00
attackerkb
CNNVD
Mattermost Plugins 安全漏洞
18 May 202600:00
cnnvd
Cvelist
CVE-2026-6342 Group prefix matching bypass for subscriptions
18 May 202607:00
cvelist
EUVD
EUVD-2026-30745
18 May 202607:00
euvd
NVD
CVE-2026-6342
18 May 202608:16
nvd
Positive Technologies
PT-2026-41647
18 May 202600:00
ptsecurity
RedhatCVE
CVE-2026-6342
5 Jun 202619:32
redhatcve
Snyk
Incorrect Authorization
18 May 202609:45
snyk
Vulnrichment
CVE-2026-6342 Group prefix matching bypass for subscriptions
18 May 202607:00
vulnrichment
NVD
Node
mattermostmattermost_serverRange10.13.010.13.11
OR
mattermostmattermost_serverRange11.1.011.1.5
OR
mattermostmattermost_serverRange11.3.011.3.4
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.1.5",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.13.11",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.3.4",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "version": "11.6.0",
        "status": "unaffected"
      },
      {
        "version": "11.5.2",
        "status": "unaffected"
      },
      {
        "version": "10.11.14",
        "status": "unaffected"
      },
      {
        "version": "11.4.4",
        "status": "unaffected"
      }
    ]
  }
]

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29 May 2026 19:11Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.3
EPSS0.00031
SSVC
15