Most recent entries from all

EUVD-2026-355280

2026-10-03T01:37:49.579781+00:00

EUVD-2026-355280

fkie_cve-2026-47686

2026-10-03T01:37:49.579814+00:00

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, handleException() in lib/setup-sandbox.js sanitizes SuppressedError.error, SuppressedError.suppressed, and AggregateError.errors but does not sanitize Error.cause, allowing sandbox code to obtain a powerful host object such as process from an embedder-exposed host function that throws an error with that object as its cause and then execute arbitrary host commands. This issue is fixed in version 3.11.6.

GHSA-m283-3h24-438v — VM2 has Missing Error.cause Sanitization that Enables Sandbox Escape to RCE

2026-10-03T01:37:49.579847+00:00

Affected: npm: vm2

**Affected:** vm2 <= 3.11.3 **CVSS 3.1:** 9.9 HIGH (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H) **CWE:** CWE-693 (Protection Mechanism Failure) **Prerequisite:** Embedder exposes a host function that throws an Error with `.cause` referencing a powerful host object (e.g., `process`)

## Summary

I found that `handleException()` in `lib/setup-sandbox.js` recursively sanitizes sub-errors for `SuppressedError` and `AggregateError`, but completely ignores the ES2022 `Error.cause` property. When sandbox code catches a host-thrown error carrying a `.cause` that references a host object like `process`, it can traverse that reference to achieve arbitrary command execution on the host.

The project's own `docs/ATTACKS.md` (Defense Invariant #3, line 54) explicitly claims Error.cause is sanitized. The implementation does not match this claim.

## Root Cause

The `handleException` function (lines 869-959 of `lib/setup-sandbox.js`) walks the prototype chain of caught errors looking for `SuppressedError` and `AggregateError`. When it finds them, it recursively sanitizes their contained errors (`.error`, `.suppressed`, `.errors[]`). For all other error types, it returns `e` directly at line 958 without inspecting `.cause`.

```javascript function handleException(e, visited) { e = ensureThis(e); if (e === null || (typeof e !== 'object' && typeof e !== 'function')) return e; // ... cycle detection ... while (proto !== null) { if (proto === localSuppressedErrorProto)…

WID-SEC-W-2026-2865 — vm2: Mehrere Schwachstellen

2026-10-03T01:37:49.579904+00:00

Ein Angreifer kann mehrere Schwachstellen in vm2 ausnutzen, um einen Denial of Service Angriff durchzuführen, um beliebigen Programmcode auszuführen, um Informationen offenzulegen, und um Daten zu manipulieren.