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CVE-2026-28735 GitHub OAuth Scope Validation

🗓️ 22 May 2026 16:26:04Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 11 Views

CVE-2026-28735: Mattermost fails to validate OAuth scope on callback, enabling access to private repos via altered GitHub scope.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-28735
22 May 202616:26
attackerkb
CNNVD
Mattermost 安全漏洞
22 May 202600:00
cnnvd
CVE
CVE-2026-28735
22 May 202616:26
cve
EUVD
EUVD-2026-31465
22 May 202616:26
euvd
Github Security Blog
Mattermost allows authenticated users to gain access to private repositories
26 May 202613:30
github
NVD
CVE-2026-28735
22 May 202617:16
nvd
OSV
GHSA-R5VF-GRCX-5VQP Mattermost allows authenticated users to gain access to private repositories
26 May 202613:30
osv
Positive Technologies
PT-2026-42799
22 May 202600:00
ptsecurity
RedhatCVE
CVE-2026-28735
5 Jun 202619:29
redhatcve
Snyk
Incorrect Authorization
26 May 202613:30
snyk
Rows per page
[
  {
    "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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