CVE-2026-92954High· 8.6▾ MidnightPoC availablevm2 is a sandbox library for running untrusted JavaScript in Node.js. In versions >= 3.10.0 and <= 3.11.7, Promises returned from the host realm into the sandbox are not marked as handled at the bridge boundary; only Promises created ins…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 47.3 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
Last analysed / modified upstream
Exploit / PoC code exists
0.3% → 0.5%
vm2 is a sandbox library for running untrusted JavaScript in Node.js. In versions >= 3.10.0 and <= 3.11.7, Promises returned from the host realm into the sandbox are not marked as handled at the bridge boundary; only Promises created inside the sandbox are wrapped with a rejection-swallowing handler (lib/setup-sandbox.js), and the bridge only installs host-side rejection sanitizers when sandbox code calls .then/.catch/.finally. As a result, code running in the sandbox can invoke a host function that returns a rejected Promise (for example events.once() exposed via the NodeVM events builtin, or any embedder-provided Promise-returning API) and simply ignore the return value, leaving the host Promise unhandled so that Node.js's default unhandled-rejection behavior terminates the host process. This is an incomplete fix of GHSA-hw58-p9xv-2mjh. The issue is fixed in version 3.11.8.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
vm2 >= 3.10.0, <= 3.11.7Patched in:
vm2 3.11.8Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
GHSA-mgj2-jqjq-q8ggCritical· 8.6Duplicate Advisory: vm2: Host-returned Promise rejection can bypass vm2's unhandled-rejection hardening and terminate the host process
CVE-2026-100722Medium· 6.8vm2 before 3.12.2 does not apply host-side Promise rejection handling in the sandbox-to-host construct trap
CVE-2026-92959High· 7.1vm2 before 3.11.8 does not fully enforce the allowAsync: false option in VM and NodeVM
CVE-2026-92955Critical· 10.0vm2 before 3.11.8 contains a sandbox escape vulnerability in NodeVM that allows attackers to access the host __proto__ getter/setter through console._stdout and console._stderr
CVE-2026-92953Critical· 10.0vm2 versions from 3.11.0 before 3.11.8 fail to protect host TypedArray and ArrayBuffer prototypes from sandbox mutation
CVE-2026-92933Medium· 5.8vm2 is a sandbox for running untrusted Node.js code