Bug 2477197 (CVE-2026-44002)

Summary: CVE-2026-44002 vm2: vm2: Information disclosure through unsanitized host paths
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abarbaro, alizardo, dschmidt, erezende, jchui, jhe, jlanda, kshier, ktsao, nboldt, oaljalju, psrna, simaishi, smcdonal, stcannon, teagle, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in vm2 (before 3.11.0). The CallSite wrapper blocks getThis() and getFunction() but returns unsanitized host absolute paths from getFileName(), allowing sandboxed code to learn host directory layout, library paths, and framework versions. Fixed in 3.11.0.
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Description OSIDB Bzimport 2026-05-13 18:02:07 UTC
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, vm2's CallSite wrapper class (intended as a safe wrapper for V8's native CallSite) blocks getThis() and getFunction() to prevent host object leakage, but allows getFileName() to return unsanitized host absolute paths. Any sandboxed code can extract the full directory structure, library paths, and framework versions of the host server. This vulnerability is fixed in 3.11.0.