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CVE-2026-9739

🗓️ 27 May 2026 21:38:55Reported by GoogleType 
cve
 cve
🔗 web.nvd.nist.gov👁 66 Views🌐 WEB

SSE uses Access-Control-Allow-Origin: *, enabling DNS rebinding for Toolbox connections (version 2024-11-05).

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-9739
27 May 202621:38
–attackerkb
circl
Circl
CVE-2026-9739
27 May 202622:53
–circl
cnnvd
CNNVD
Google MCP Toolbox for Databases security vulnerabilities
27 May 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-9739
27 May 202621:38
–cvelist
euvd
EUVD
EUVD-2026-32672
28 May 202600:30
–euvd
github
Github Security Blog
MCP Toolbox for Databases vulnerable to DNS rebinding attacks
28 May 202600:30
–github
mend
Mend
CVE-2026-9739
27 May 202621:38
–mend
nvd
NVD
CVE-2026-9739
27 May 202623:16
–nvd
osv_ghsa
osv_ghsa
GHSA-7PF3-8XX7-RVHF MCP Toolbox for Databases vulnerable to DNS rebinding attacks
28 May 202600:30
–osv_ghsa
osv_go
osv_go
GO-2026-5870 MCP Toolbox for Databases vulnerable to DNS rebinding attacks in github.com/googleapis/mcp-toolbox
7 Jul 202615:26
–osv_go
Rows per page
Vulners
[
  {
    "vendor": "Google",
    "product": "MCP Toolbox for Databases",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "PR 3054 (Fix CORS bypass)",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
ParameterPositionPathDescriptionCWE
Access-Control-Allow-Originheader/Hardcoded Access-Control-Allow-Origin: * header in the SSE initialization handler allows for DNS rebinding attacks.CWE-942

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17 Jun 2026 11:05Current
8.3High risk
Vulners AI Score8.3
CVSS 49.4
EPSS0.00237
SSVC
66