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CVE-2026-28735

🗓️ 22 May 2026 16:26:04Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 29 Views

Mattermost fails to validate OAuth scope on callback, enabling access to private repositories via altered GitHub scope.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-28735
22 May 202616:26
attackerkb
CNNVD
Mattermost 安全漏洞
22 May 202600:00
cnnvd
Cvelist
CVE-2026-28735 GitHub OAuth Scope Validation
22 May 202616:26
cvelist
EUVD
EUVD-2026-31465
22 May 202616:26
euvd
NVD
CVE-2026-28735
22 May 202617:16
nvd
Positive Technologies
PT-2026-42799
22 May 202600:00
ptsecurity
RedhatCVE
CVE-2026-28735
5 Jun 202619:29
redhatcve
Vulnrichment
CVE-2026-28735 GitHub OAuth Scope Validation
22 May 202616:26
vulnrichment
NVD
Node
mattermostmattermost_serverRange10.11.010.11.15
OR
mattermostmattermost_serverRange11.4.011.4.5
OR
mattermostmattermost_serverRange11.5.011.5.4
OR
mattermostmattermost_serverRange11.6.011.6.1
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.6.0",
        "status": "affected",
        "version": "11.6.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.5.3",
        "status": "affected",
        "version": "11.5.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.4.4",
        "status": "affected",
        "version": "11.4.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.14",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "version": "11.7.0",
        "status": "unaffected"
      },
      {
        "version": "11.6.1",
        "status": "unaffected"
      },
      {
        "version": "11.5.4",
        "status": "unaffected"
      },
      {
        "version": "11.4.5",
        "status": "unaffected"
      },
      {
        "version": "10.11.15",
        "status": "unaffected"
      }
    ]
  }
]

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