{"id":"CVE-2026-77339","revision":"d28fe82994304b11b19a63902dfd809f","records":[{"revision":"d28fe82994304b11b19a63902dfd809f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-77339","aliases":[],"title":"Process Compose: Browser DNS rebinding lets websites control local process-compose MCP tools","description":"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.","state":0,"publishedAt":"2026-09-18T16:37:19.072+00:00","modifiedAt":"2026-09-18T16:49:46.487+00:00","affected":[{"ecosystem":"Vendor product","name":"process-compose","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"F1bonacc1\",\n                    \"product\": \"process-compose\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.120.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:H/SA:N","score":5.1,"severity":"MEDIUM"}],"references":["https://github.com/F1bonacc1/process-compose/security/advisories/GHSA-5gm3-9crp-6g3v","https://github.com/F1bonacc1/process-compose/commit/6ffa74f462cd2fa4f8dc1ee63c70b793b298c858","https://github.com/F1bonacc1/process-compose/releases/tag/v1.120.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-77339","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-77339","identifiers":["CVE-2026-77339"]},"retained":false,"historicalAffected":[]}],"coverage":[]}