Vulnerability in Patriksimek Vm2
CVE-2026-92955
vm2 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. Attackers can overwrite EventEmitter.prototype.emit and trigger process events to execute code with process context, bypassing code generation restrictions.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/patriksimek/vm2/security/advisories/GHSA-88hf-g992-jg85 (vendor-advisory)
- www.vulncheck.com/advisories/vm2-before-3.11.8-sandbox-escape-via-nodevm (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92955?
- CVE-2026-92955 is a critical-severity vulnerability in Patriksimek Vm2, classified under Improper Control of Dynamically-Managed Code Resources. CVSS score: 10.0/10. Published 2026-09-17.
- How severe is CVE-2026-92955?
- Critical severity. CVSS v3 base score is 10.0 out of 10.