Information disclosure in Patriksimek Vm2
CVE-2026-92933
vm2 is a sandbox for running untrusted Node.js code. In versions <= 3.11.7, NodeVM exposes the host `util` module to the sandbox as an unfiltered shallow copy (`Object.assign({}, util)` in `defaultBuiltinLoaderUtil`), and the deprecated `sys` builtin (an alias of host `util`) is exposed through the generic builtin loader. On Node.js >= 22.9 this hands sandboxed code `util.getCallSites()`, a programmatic stack-introspection API that returns the host process's full call stack, including absolute file paths, function names, and line numbers for vm2 bridge internals and the embedding application's entrypoint. This bypasses the host-frame redaction introduced for GHSA-v27g-jcqj-v8rw, which only applies to the `Error.prepareStackTrace` formatting channel. The issue is fixed in vm2 3.11.8.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/patriksimek/vm2/security/advisories/GHSA-r273-hxvj-fxhp (vendor-advisory)
- www.vulncheck.com/advisories/vm2-before-3.11.8-information-disclosure-via-util-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92933?
- CVE-2026-92933 is a medium-severity vulnerability in Patriksimek Vm2, classified under Information Disclosure. CVSS score: 5.8/10. Published 2026-09-17.
- How severe is CVE-2026-92933?
- Medium severity. CVSS v3 base score is 5.8 out of 10.