CVE-2026-92953

vm2 3.11.0 through 3.11.7 Prototype Pollution via TypedArray

At a glance

Severity: CRITICAL 9.3
EPSS: EPSS 0.50 % · percentile 43 (2026-10-27)
State: PUBLISHED
Published: 2026-09-17
Updated: 2026-09-18
Assigner: VulnCheck
NVD status: Deferred

Description

vm2 versions from 3.11.0 before 3.11.8 fail to protect host TypedArray and ArrayBuffer prototypes from sandbox mutation. Attackers can use prototype-walking primitives to reach and modify host Uint8Array.prototype, %TypedArray%.prototype, and ArrayBuffer.prototype, causing host-created typed arrays to observe attacker-controlled properties after VM.run() returns.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	CRITICAL 9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H	VulnCheck
CVSS 3.1	CRITICAL 10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H	VulnCheck
CVSS 4.0	CRITICAL 9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/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	CRITICAL 10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H	NVD · disclosure@vulncheck.com (Secondary)

Weaknesses (CWE)

CWE-913

Advisories

GHSA-3vgf-8m4q-q4qr — vm2: Default VM can mutate host TypedArray and ArrayBuffer intrinsics after the host-prototype pollution fix

European references

ENISA EUVD · EUVD-2026-81602
GCVE · GCVE-0-2026-92953

Affected products

Product	Versions
patriksimek · vm2	affected 3.11.0 < 3.11.8 ; unaffected 3.11.8

References

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