{"affected":[{"product":"heym","source":"CNA: GitHub_M","vendor":"heymrun","versions":[{"status":"affected","version":"< 0.0.70"}]}],"cveId":"CVE-2026-67543","cwes":["CWE-94","CWE-269"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.8,"severity":"high","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794433193192,"publishedAt":1794433193192,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/heymrun/heym/security/advisories/GHSA-hcv7-mg77-pg73"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/heymrun/heym/commit/2155057f4153a1e3a7b789d104f7fa96e92964e5"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/heymrun/heym/commit/28bb2901e4dea128ac493f67ee9478d230b7a3d7"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/heymrun/heym/releases/tag/0.0.70"}],"remediation":[],"revision":"4fcfa6adfd8867aa5df02b420998c0a87284fca089c2b94ed82d21a54aea020d","sources":[{"modifiedAt":1794433193192,"name":"CNA: GitHub_M","retrievedAt":1794435078955,"url":"https://www.cve.org/CVERecord?id=CVE-2026-67543"}],"ssvc":null,"status":"published","title":"Heym Unsandboxed skill code execution: skills run via a local backend subprocess without the Docker isolation that Python tools mandate","updatedAt":1794435078955}