CVE-2026-44003

vm2: Transformer Fast-Path Bypass Exposes Internal State Variable

At a glance

Severity: MEDIUM 5.3
EPSS: EPSS 0.25 % · percentile 16 (2026-10-27)
State: PUBLISHED
Published: 2026-05-13
Updated: 2026-05-13
Assigner: GitHub_M
NVD status: Analyzed

Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, vm2's code transformer has a performance optimization that skips AST analysis when the code does not contain catch, import, or async keywords. This fast-path bypass allows sandboxed code to directly access the internal VM2_INTERNAL_STATE_DO_NOT_USE_OR_PROGRAM_WILL_FAIL variable, which exposes internal security functions (handleException, wrapWith, import). This vulnerability is fixed in 3.11.0.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	NVD · security-advisories@github.com (Secondary)
CVSS 3.1	MEDIUM 5.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-693

Advisories

GHSA-wp5r-2gw5-m7q7 — vm2's Transformer Fast-Path Bypass Exposes Internal State Variable

European references

ENISA EUVD · EUVD-2026-30073
GCVE · GCVE-0-2026-44003

Affected configurations (NVD CPE)

cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* < 3.11.0

Affected products

Product	Versions
patriksimek · vm2	affected < 3.11.0

References

https://github.com/patriksimek/vm2/security/advisories/GHSA-wp5r-2gw5-m7q7

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