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CVE-2026-42559

🗓️ 14 May 2026 14:24:56Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 55 Views🌐 WEB

DNS rebinding in RMCP streamable server permits unauthorized requests via Host header; fixed.

Related
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
githubexploit
GithubExploit
Exploit for CVE-2026-42559
6 Sep 202622:33
–githubexploit
attackerkb
attackerkb
CVE-2026-42559
14 May 202614:24
–attackerkb
cgr
Chainguard
CVE-2026-42559 vulnerabilities
8 May 202613:17
–cgr
circl
Circl
CVE-2026-42559
18 May 202617:40
–circl
cnnvd
CNNVD
RMCP Access Control Vulnerability
14 May 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-42559 RMCP: DNS rebinding vulnerability in rmcp Streamable HTTP server transport
14 May 202614:24
–cvelist
euvd
EUVD
EUVD-2026-30292
14 May 202614:24
–euvd
fedora
Fedora
[SECURITY] Fedora 43 Update: goose-1.36.0-1.fc43
25 Jun 202616:25
–fedora
fedora
Fedora
[SECURITY] Fedora 44 Update: goose-1.36.0-1.fc44
25 Jun 202616:08
–fedora
nessus
Tenable Nessus
Fedora 44 : goose (2026-00021c7c91)
25 Jun 202600:00
–nessus
Rows per page
[
  {
    "vendor": "modelcontextprotocol",
    "product": "rust-sdk",
    "versions": [
      {
        "version": "< 1.4.0",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
Hostheader/The Streamable HTTP server transport in the rmcp crate fails to validate the Host header, allowing for DNS rebinding attacks to reach internal services.CWE-346, CWE-350

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17 Jun 2026 10:48Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.18.8
EPSS0.00242
SSVC
55