CVE-2026-92934

vm2 before 3.11.8 Sandbox Escape RCE via AggregateError

At a glance

Severity: CRITICAL 9.5
EPSS: EPSS 0.76 % · percentile 55 (2026-10-27)
State: PUBLISHED
Published: 2026-09-17
Updated: 2026-09-17
Assigner: VulnCheck
NVD status: Deferred

Description

vm2 before 3.11.8 contains an incomplete fix for Error.cause sanitization that allows sandbox escape when revisited host-wrapped AggregateError objects are caught within a single exception handler traversal. Attackers can exploit cycle detection bypass in handleException to access unsanitized host proxies embedded in the errors array, enabling full remote code execution and process information disclosure from the sandbox.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	CRITICAL 9.5	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	VulnCheck
CVSS 3.1	CRITICAL 9.0	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	VulnCheck
CVSS 4.0	CRITICAL 9.5	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/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 9.0	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	NVD · disclosure@vulncheck.com (Secondary)

Weaknesses (CWE)

CWE-693

Advisories

GHSA-x965-fc75-jpqh — vm2 sandbox escape to host RCE via revisited host-wrapped AggregateError bypassing Error sanitization cycle short-circuit

European references

ENISA EUVD · EUVD-2026-81584
GCVE · GCVE-0-2026-92934

Affected products

Product	Versions
patriksimek · vm2	affected 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