{"id":"CVE-2026-67543","summary":"Heym Unsandboxed skill code execution: skills run via a local backend subprocess without the Docker isolation that Python tools mandate","details":"Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to version 0.0.70, heym hardens one untrusted-code path but not its sibling. The Python tool executor (python_tool_executor.py) treats user code as untrusted and mandates a Docker sandbox (no network, read-only fs, non-root, no docker socket), failing closed. The skill executor (skill_python_executor.py) runs skill Python via a local backend subprocess with no Docker isolation — only a 512 MB RLIMIT and a 7-key env denylist — so a skill executes inside the backend execution context, with filesystem access, network egress, and non-denylisted environment variables that should not be exposed to untrusted/shared skills. In the shipped Docker config (backend runs as root + /var/run/docker.sock mounted), this escalates to host root. This issue has been patched in version 0.0.70.","aliases":["GHSA-hcv7-mg77-pg73"],"modified":"2026-11-12T10:45:41.827328356Z","published":"2026-11-11T21:39:53.192Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67543.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-269","CWE-94"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67543.json"},{"type":"FIX","url":"https://github.com/heymrun/heym/commit/2155057f4153a1e3a7b789d104f7fa96e92964e5"},{"type":"FIX","url":"https://github.com/heymrun/heym/commit/28bb2901e4dea128ac493f67ee9478d230b7a3d7"},{"type":"WEB","url":"https://github.com/heymrun/heym/releases/tag/0.0.70"},{"type":"ADVISORY","url":"https://github.com/heymrun/heym/security/advisories/GHSA-hcv7-mg77-pg73"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67543"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/heymrun/heym","events":[{"introduced":"0"},{"fixed":"b67e9efb6623385125347b2610e422d18f1c82fa"},{"fixed":"2155057f4153a1e3a7b789d104f7fa96e92964e5"},{"fixed":"28bb2901e4dea128ac493f67ee9478d230b7a3d7"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"0.0.70"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"2155057f4153a1e3a7b789d104f7fa96e92964e5"}]},{"source":"REFERENCES_COMMIT","range":[{"fixed":"28bb2901e4dea128ac493f67ee9478d230b7a3d7"}]},{"original_tag":"0.0.70","range":[{"fixed":"b67e9efb6623385125347b2610e422d18f1c82fa"}],"source":"REFERENCES_TAG"}]}}],"versions":["v0.0.64","v0.0.63","v0.0.62","v0.0.61","v0.0.60","v0.0.59","v0.0.58","v0.0.57","v0.0.56","v0.0.55","v0.0.54","v0.0.53","v0.0.52","v0.0.51","v0.0.50","v.0.0.49","v0.0.48","v0.0.47","v0.0.46","v0.0.45","v0.0.44","v0.0.43","v0.0.42","v0.0.41","v0.0.40","v0.0.39","v0.0.38","v0.0.37","v0.0.36","v0.0.35","v0.0.34","v0.0.33","v0.0.32","v0.0.31","v0.0.30","v0.0.29","v0.0.27","v0.0.26","v0.0.25","v0.0.24","v0.0.23","v0.0.22","v0.0.21","v0.0.20","v0.0.19","v0.0.18","v0.0.17","v0.0.16","v0.0.15","v0.0.14","v0.0.13","v0.0.12","v0.0.11","v0.0.10","v0.0.9","v0.0.8","v0.0.7","v0.0.6","v0.0.5","v0.0.4","v0.0.3","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67543.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}