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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-47683

vm2: bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, the bufferAllocLimit enforcement in lib/setup-sandbox.js does not cover Buffer.concat(list, totalLength) or Buffer.from(arrayLike) with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory allocations that bypass the configured cap and can exhaust the host process. This issue is fixed in version 3.11.6.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

patriksimek vm2

  • < 3.11.6affected

References