CVE-2026-47683

A flaw was found in vm2, an open-source virtual machine VM sandbox for Node.js. This vulnerability allows malicious code running within the sandbox to bypass the configured memory allocation limit. By crafting specific calls to Buffer.concat or Buffer.from with attacker-controlled lengths, the...

CVE-2026-47683

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.concatlist, totalLength or Buffer.fromarrayLike with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory...

CVE-2026-47683 vm2: bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

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.concatlist, totalLength or Buffer.fromarrayLike with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory...

CVE-2026-47683

In vm2

CVE-2026-47683 vm2: bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

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.concatlist, totalLength or Buffer.fromarrayLike with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory...

vm2's bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

Summary vm2 bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike The bufferAllocLimit option introduced in 3.11.0 GHSA-6785-pvv7-mvg7 caps host-side Buffer allocations driven by sandbox code, the way embedders opt into timeout. The cap wraps Buffer.alloc, Buffer.allocUnsafe,...

GHSA-GMC2-2X9W-CGH9 vm2's bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

Summary vm2 bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike The bufferAllocLimit option introduced in 3.11.0 GHSA-6785-pvv7-mvg7 caps host-side Buffer allocations driven by sandbox code, the way embedders opt into timeout. The cap wraps Buffer.alloc, Buffer.allocUnsafe,...

PT-2026-76815

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.concatlist, totalLength or Buffer.fromarrayLike with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory...