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CVE-2026-77339

🗓️ 18 Sep 2026 16:37:19Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 34 Views🌐 WEB

DNS rebinding in Process Compose MCP SSE lets websites control local processes up to 1.120.0

Related
Detection
Affected
Refs
Paths
Vulners
Node
[
  {
    "vendor": "F1bonacc1",
    "product": "process-compose",
    "versions": [
      {
        "version": "< 1.120.0",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
Host headerheader/sseThe MCP SSE endpoint at /sse accepts browser-origin requests without validating Host/Origin headers or authenticating, enabling DNS rebinding to issue MCP requests and potentially manage local processes and logs when expose_control_tools is enabled. Fixed in 1.120.0.CWE-306, CWE-346
Origin headerheader/sseThe MCP SSE endpoint at /sse accepts browser-origin requests without validating Host/Origin headers or authenticating, enabling DNS rebinding to issue MCP requests and potentially manage local processes and logs when expose_control_tools is enabled. Fixed in 1.120.0.CWE-306, CWE-346
Authorization headerheader/sseThe MCP SSE endpoint at /sse accepts browser-origin requests without validating Host/Origin headers or authenticating, enabling DNS rebinding to issue MCP requests and potentially manage local processes and logs when expose_control_tools is enabled. Fixed in 1.120.0.CWE-306, CWE-346

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24 Sep 2026 21:25Current
5.9Medium risk
Vulners AI Score5.9
CVSS 45.1
EPSS0.00256
SSVC
34