GHSA-FCQC-726X-5WFC vm2: Sandboxed code can read and write host-realm memory via Node's shared Buffer pool

Summary Sandboxed code is able to disclose host memory used by small allocations by Buffer.from, Buffer.concat. Details vm2 exposes Buffer object to sandboxed code by default. Small Buffer allocations for example, Buffer.allocUnsafe, Buffer.fromarray, Buffer.fromstring, and Buffer.concat use the...

The vulnerabilities of the `Buffer.from()` and `Buffer.concat()` functions in the `vm2` library from the NPM package manager allow a malicious actor to gain unauthorized access to protected information and cause service failures.

The vulnerabilities of the Buffer.from and Buffer.concat functions in the vm2 library from the NPM package manager are related to information disclosure. Exploiting these vulnerabilities could allow an attacker to gain unauthorized access to protected information and cause service failures...

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 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

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

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,...

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,...

Allocation of Resources Without Limits or Throttling

Overview org.webjars.npm:vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the Buffer.concat and Buffer.from functions. An attacker can exhaust hos...

PT-2026-76815

Name of the Vulnerable Software and Affected Versions vm2 versions prior to 3.11.6 Description An issue exists where the bufferAllocLimit enforcement in lib/setup-sandbox.js is bypassed. While this limit is intended to cap host-side Buffer allocations driven by sandbox code to prevent Denial of...

CVE-2025-59472

A denial of service vulnerability exists in Next.js versions with Partial Prerendering PPR enabled when running in minimal mode. The PPR resume endpoint accepts unauthenticated POST requests with the "Next-Resume: 1" header and processes attacker-controlled postponed state data. Two closely relat...