CVE-2026-47683CWE-770denial-of-service

CVE-2026-47683

published August 18, 2026

CVSS
8.7
EPSS
1%
Percentile
44.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.7 · NONE
CVSS v4.0
8.7 · 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
EPSS
0.00538 · 44.5th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-08-18T01:16Z
References (4)
https://github.com/patriksimek/vm2/commit/3ffb315512e634cf85c447375e85d6c83d00a4bd · [email protected]https://github.com/patriksimek/vm2/releases/tag/3.11.6 · [email protected]https://github.com/patriksimek/vm2/security/advisories/GHSA-gmc2-2x9w-cgh9 · [email protected]https://github.com/patriksimek/vm2/security/advisories/GHSA-gmc2-2x9w-cgh9 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 AUG 20:55Z
    vm2: bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike
    cvelistv5