{"id":"CVE-2026-55376","revision":"c8b50fc704d9418f94647ffb1aebd6b6","records":[{"revision":"c8b50fc704d9418f94647ffb1aebd6b6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-55376","aliases":[],"title":"heym Python Tool Sandbox Escape","description":"Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to 0.0.40, an authenticated user who can create or edit a workflow with an Agent custom Python tool can bypass the blacklist-based sandbox in backend/app/services/python_tool_executor.py because allowed standard-library modules expose operating-system, process, and filesystem capabilities through public attributes that pass _safe_import() and _validate_code_safety(). The runner then executes the supplied tool with exec(), permitting commands and file operations as the backend application user; self-registration affects reachability, but portal triggering alone does not grant code control. This issue is fixed in 0.0.40.","state":0,"publishedAt":"2026-10-13T15:12:49.604+00:00","modifiedAt":"2026-10-16T22:00:50.339+00:00","affected":[{"ecosystem":"Vendor product","name":"heym","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"heymrun\",\n                    \"product\": \"heym\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.0.40\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/heymrun/heym/security/advisories/GHSA-wcgw-9hfw-f6f2","https://github.com/heymrun/heym/commit/b36d795c6ea841b8f1b511a0952e274487ee4ef3","https://github.com/heymrun/heym/releases/tag/v0.0.40"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55376","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-55376","identifiers":["CVE-2026-55376"]},"retained":false,"historicalAffected":[]}],"coverage":[]}