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CVE-2026-63118 MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection

🗓️ 29 Jul 2026 19:07:33Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 53 Views

CVE-2026-63118: StreamableHTTPTransport lacks Host/Origin validation enabling DNS rebinding to an MCP server; 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
euvd
EUVD
EUVD-2026-50489
30 Jul 202614:41
euvd
github
Github Security Blog
MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
30 Jul 202614:41
github
nvd
NVD
CVE-2026-63118
29 Jul 202620:17
nvd
osv
OSV
GHSA-RJR6-RCGV-9M7M MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
30 Jul 202614:41
osv
ptsecurity
Positive Technologies
PT-2026-65888
29 Jul 202600:00
ptsecurity
rubygems
RubySec
Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
7 Jul 202600:00
rubygems
snyk
Snyk
DNS Rebinding
17 Jul 202618:21
snyk
Rows per page
[
  {
    "vendor": "modelcontextprotocol",
    "product": "ruby-sdk",
    "versions": [
      {
        "version": "< 0.23.0",
        "status": "affected"
      }
    ]
  }
]

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