CVE Watch11 de nov. de 2026

CVE-2026-65957

Helio is an MCP proxy that sits between AI agents and the tools they use. Prior to version 0.8.0, the dashboard sideband (default 127.0.0.1:

CVSS

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Sem CVSS

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 11 de nov. de 2026 · Última mod.: 11 de nov. de 2026 · CWE-346 · CWE-942

EPSS · 30d

Ainda não há histórico EPSS suficiente.

Descrição técnica

Helio is an MCP proxy that sits between AI agents and the tools they use. Prior to version 0.8.0, the dashboard sideband (default 127.0.0.1:3100) validated CORS request origins by matching the hostname against a private-network string prefix (10., 172.16.–172.31., 192.168.) rather than validating an IP address. A public DNS name such as 192.168.attacker.com, 10.evil.io, or 172.16.pwn.example also satisfies that prefix, so the proxy echoed the attacker origin in Access-Control-Allow-Origin. This issue has been patched in version 0.8.0.

Referências oficiais

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