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EUVD-2026-50489

🗓️ 29 Jul 2026 19:07:33Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 4 Views

MCP Ruby SDK before 0.23.0 allowed DNS rebinding via unvalidated Host and Origin headers to access local MCP server tools; fixed in 0.23.0.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-63118
29 Jul 202619:07
attackerkb
circl
Circl
CVE-2026-63118
29 Jul 202620:51
circl
cve
CVE
CVE-2026-63118
29 Jul 202619:07
cve
cvelist
Cvelist
CVE-2026-63118 MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
29 Jul 202619:07
cvelist
nvd
NVD
CVE-2026-63118
29 Jul 202620:17
nvd
ptsecurity
Positive Technologies
PT-2026-65888
29 Jul 202600:00
ptsecurity
snyk
Snyk
DNS Rebinding
17 Jul 202618:21
snyk
vulnrichment
Vulnrichment
CVE-2026-63118 MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
29 Jul 202619:07
vulnrichment
[
  {
    "enisaIdVendor": [
      {
        "id": "c260fbc9-53e9-3d26-8cb4-c9e1f8c0e2ba",
        "vendor": {
          "name": "modelcontextprotocol"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "bc31aacd-7ac5-315b-9048-f712c49ea773",
        "product": {
          "name": "ruby-sdk",
          "vendor": {
            "name": "modelcontextprotocol"
          }
        },
        "product_version": "< 0.23.0"
      }
    ]
  }
]

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29 Jul 2026 19:35Current
5.9Medium risk
Vulners AI Score5.9
CVSS 46.9
SSVC
4