CVE-2026-92949

vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptor

En bref

Sévérité: MEDIUM 6.3
EPSS: EPSS 0.32 % · centile 25 (2026-10-27)
État: PUBLISHED
Publiée: 2026-09-17
Mise à jour: 2026-09-21
Attribuée par: VulnCheck
Statut NVD: Deferred

Description

vm2 versions from 3.9.6 before 3.11.7 fail to properly restrict access to accessor properties on frozen objects, allowing sandboxed scripts to bypass vm.freeze() and vm.readonly() protections. Attackers can use Object.getOwnPropertyDescriptor() or __lookupSetter__() to extract and invoke host object setters directly, mutating properties the embedder explicitly marked read-only.

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	MEDIUM 6.3	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N	VulnCheck
CVSS 3.1	MEDIUM 4.0	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N	VulnCheck
CVSS 4.0	MEDIUM 6.3	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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 · disclosure@vulncheck.com (Secondary)
CVSS 3.1	MEDIUM 4.0	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N	NVD · disclosure@vulncheck.com (Secondary)

Faiblesses (CWE)

CWE-471

Avis

GHSA-633r-hq9m-c4ff — vm2: vm.freeze()/vm.readonly() bypass via accessor descriptor

Références européennes

ENISA EUVD · EUVD-2026-81598
GCVE · GCVE-0-2026-92949

Produits affectés

Produit	Versions
patriksimek · vm2	affected 3.9.6 < 3.11.7 ; unaffected 3.11.7

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