CVE-2026-47683

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

En bref

Sévérité: HIGH 8.7
EPSS: EPSS 0.54 % · centile 45 (2026-10-27)
État: PUBLISHED
Publiée: 2026-08-17
Mise à jour: 2026-08-18
Attribuée par: GitHub_M
Statut NVD: Deferred

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.

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	HIGH 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	GitHub_M
CVSS 4.0	HIGH 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/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	NVD · security-advisories@github.com (Secondary)

Faiblesses (CWE)

CWE-770

Avis

GHSA-gmc2-2x9w-cgh9 — vm2's bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

Références européennes

ENISA EUVD · EUVD-2026-60461
GCVE · GCVE-0-2026-47683

Produits affectés

Produit	Versions
patriksimek · vm2	affected < 3.11.6

Références

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD