EUVD-2026-81586
GHSA-63m2-qqch-jxv2
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Untrusted sandbox code reaches the flaw with no auth or interaction (PR:N/UI:N/AC:L); crossing the sandbox-to-host boundary is a scope change (S:C); impact is limited host-path disclosure (C:L, I:N, A:N).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
vm2 versions 3.11.0 through 3.11.6 leak absolute host filesystem paths to sandboxed code through error stack formatting. Attacker-supplied code can force the host-realm source transformer to throw a SyntaxError (for example by calling eval with malformed source) and then read the error's .stack property; the bridge forwards the .stack read to the host-realm formatter, bypassing the sandbox-side host-path redaction introduced for GHSA-v27g-jcqj-v8rw. The returned stack string discloses absolute paths from vm2, Node.js internals, and the embedding application's own source tree, along with host function names. Default new VM() and new NodeVM() configurations are affected without any special options, and the issue persists when string eval is disabled because the host-side transformer throws before eval is handled. The impact is information disclosure only; no code execution results. Fixed in vm2 3.11.7.
AnalysisAI
Absolute host filesystem path disclosure in vm2 3.11.0 through 3.11.6 allows attacker-supplied JavaScript running inside a vm2 sandbox to force the host-realm source transformer to throw a SyntaxError (for example via eval with malformed source) and then read the resulting error's .stack property, which the bridge forwards to the host-realm formatter. Default new VM() and new NodeVM() configurations are affected with no special options, and the leak persists even when string eval is disabled, because the host-side transformer throws before eval is handled. …
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Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires that the embedding application runs attacker-controlled JavaScript inside a vm2 sandbox (the inherent vm2 threat model). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but low-to-moderate real-world risk best characterized as high-CVSS-appearance-but-modest-impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: vm2 3.11.7 - upgrade to 3.11.7 or later, which is the primary and recommended fix; advisory links are https://github.com/patriksimek/vm2/security/advisories/GHSA-x6m4-chr9-cg97 and https://www.vulncheck.com/advisories/vm2-3.11.0-before-3.11.7-information-disclosure-via-error-stack. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-209 – Error Message Information Leak
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External POC / Exploit Code
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