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CVE-2026-14541 Authentication Bypass and Audience Confusion in MCP Toolbox OAuth Provider

🗓️ 31 Jul 2026 01:48:39Reported by GoogleType 
cvelist
 cvelist
🔗 www.cve.org👁 5 Views

Authentication bypass in MCP Toolbox OAuth when audience or clientId is missing, enabling misuse of Google access tokens.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-14541
31 Jul 202601:48
attackerkb
circl
Circl
CVE-2026-14541
31 Jul 202604:00
circl
cve
CVE
CVE-2026-14541
31 Jul 202601:48
cve
euvd
EUVD
EUVD-2026-51381
31 Jul 202601:48
euvd
nvd
NVD
CVE-2026-14541
31 Jul 202603:16
nvd
osv
OSV
CVE-2026-14541 Authentication Bypass and Audience Confusion in MCP Toolbox OAuth Provider
31 Jul 202601:48
osv
ptsecurity
Positive Technologies
PT-2026-66667
31 Jul 202600:00
ptsecurity
[
  {
    "vendor": "Google",
    "product": "mcp-toolbox",
    "versions": [
      {
        "status": "affected",
        "version": "1.4.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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