CVE Watch18 sept 2026

CVE-2026-77339

Process Compose is a scheduler and orchestrator for non-containerized applications. Prior to 1.120.0, the MCP SSE listener in src/mcp/server

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 18 sept 2026 · Última mod.: 18 sept 2026 · CWE-306 · CWE-346

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

Process Compose is a scheduler and orchestrator for non-containerized applications. Prior to 1.120.0, the MCP SSE listener in src/mcp/server.go accepts browser-origin requests to /sse and the returned message endpoint without validating the Host header, validating the Origin header, or authenticating the caller. When MCP SSE is enabled, a malicious website can use DNS rebinding to reach the loopback listener and issue MCP requests. If expose_control_tools is enabled, the attacker can enumerate process state, read or search logs, truncate logs, and start, stop, restart, or scale local processes; configured user-defined tools can expose additional commands and output. The Gin REST API token middleware does not protect this separately started MCP listener. This issue is fixed in version 1.120.0.

Referencias oficiales

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