CVE-2026-45411 vm2: Sandbox Breakout Using Async Generator
Attackers can escape the vm2 sandbox via async generator exceptions to execute arbitrary code on the host system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45411?
CVE-2026-45411 is a critical code injection vulnerability in patriksimek vm2, published on 13 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.3, it is possible to catch a host exception using the yield* expression inside an async generator. When the generator is closed using the return function, the value is awaited on and exceptions thrown in the then call will be caught by the runtime and passed to the yield* iterator as the next value. This allows attackers to write code which can escape from the VM2 sandbox and execute arbitrary commands on the host system. This vulnerability is fixed in 3.11.3.
Which versions are affected by CVE-2026-45411?
2 open source packages ship an affected version, including vm2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vm2 npm | All versions | 3.11.3 |
vm2 npm | All versions | 3.11.3 |
Products include Vm2 Project Vm2.
How do I fix CVE-2026-45411?
Upgrade vm2 to 3.11.3 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-45411 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45411 exists.
Other vulnerabilities in patriksimek vm2
Sources
Also known as ECHO-272e-9f96-27f5, GHSA-248r-7h7q-cr24, MINI-mvg7-wr8x-wp6m, ROOT-APP-NPM-CVE-2026-45411.