EUVD-2026-81611
GHSA-3m4j-9x2m-pq7h
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/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
Attacker-supplied sandbox JS reaches the host over the network with no auth or interaction (PR:N/UI:N), single synchronous allocation is trivially reliable (AC:L); impact is host OOM only (A:H, C:N/I:N), no scope change to another component.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5Blast Radius
ecosystem impact- 40 npm packages depend on vm2 (6 direct, 34 indirect)
Ecosystem-wide dependent count for version 3.11.6.
DescriptionCVE.org
vm2 before 3.11.6 fails to enforce bufferAllocLimit on ArrayBuffer, SharedArrayBuffer, and TypedArray constructors, allowing attackers to allocate arbitrary host memory. Attackers can bypass the buffer allocation cap by using these V8 intrinsics to exhaust host process memory and trigger out-of-memory conditions.
AnalysisAI
Memory exhaustion denial of service in vm2 through 3.11.5 lets sandboxed JavaScript escalate beyond the operator-configured bufferAllocLimit by allocating host memory through ArrayBuffer, SharedArrayBuffer, and TypedArray constructors, which the cap never intercepts. Because the allocation is a single synchronous V8 call, vm2's timeout cannot interrupt it, and any deployment that runs untrusted code in a VM - the library's standard use case - is exposed without needing bufferAllocLimit to be enabled at all. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The application must use vm2 (<=3.11.5) to execute untrusted/attacker-controlled JavaScript inside a VM sandbox - this is vm2's normal use case, so no special product configuration is required. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a real but bounded issue whose severity is entirely a function of vm2's threat model. … 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 3.11.6 - the npm package records vulnerable <= 3.11.5 and fixed in 3.11.6, so upgrade to vm2 3.11.6 or later, reinstall dependencies, and pin the resolved version in the lockfile to prevent regression to a vulnerable transitive copy; verify with npm ls vm2 and treat the guidance in GHSA-v836-6xw4-9cx3 and the VulnCheck advisory (https://www.vulncheck.com/advisories/vm2-before-3.11.6-memory-exhaustion-dos-via-bufferalloclimit-bypass) as authoritative. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all applications and services using vm2, focusing on versions 3.11.5 and earlier, and assess exposure in production environments, especially those with memory limits like Docker, Kubernetes, or AWS Lambda. …
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