CVE-2026-92961 vm2 before 3.11.6 Memory Exhaustion DoS via bufferAllocLimit Bypass
Attackers can exhaust host memory by bypassing allocation limits in the vm2 JavaScript sandbox library, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-92961?
CVE-2026-92961 is a high-severity denial of service vulnerability in patriksimek vm2, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
vm2 before 3.11.6 fails to enforce bufferAllocLimit on ArrayBuffer, SharedArrayBuffer, and TypedArray constructors, allowing attackers to allocate arbitrary host memory. Attackers can bypass the buffer allocation cap by using these V8 intrinsics to exhaust host process memory and trigger out-of-memory conditions.
Weakness: CWE-770
Which versions are affected by CVE-2026-92961?
2 open source packages ship an affected version, including vm2.
| Package | Affected | Fixed in |
|---|---|---|
vm2 npm | All versions | 3.11.6 |
vm2 npm | All versions | 3.11.6 |
How do I fix CVE-2026-92961?
Upgrade vm2 to 3.11.6 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-92961 being exploited?
There is no known exploitation of CVE-2026-92961 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-EM16242, ECHO-d702-6934-d30e, GHSA-3m4j-9x2m-pq7h, GHSA-v836-6xw4-9cx3, MINI-qfg7-298q-94rc, ROOT-APP-NPM-GHSA-v836-6xw4-9cx3.