CVE-2026-92934: vm2 sandbox escape to host RCE via revisited host-wrapped AggregateError bypassing Error sanitization cycle short-circuit
vm2 3.11.6 (this fork’s latest release) contains an incomplete-fix bypass of the Error.cause host-reference sanitization added in GHSA-m283-3h24-438v (commit 7e3faaf). Sandbox code that catches a host-wrapped AggregateError which is revisited within a single handleException traversal (self-cycle, mutual-cycle, or the same host aggregate referenced twice in errors[]) receives a live, unsanitized host proxy inside the “sanitized” errors[], yielding full host RCE on the throw channel that the fix and Defense Invariant #3 explicitly promise to sanitize.
References
- github.com/advisories/GHSA-x965-fc75-jpqh
- github.com/patriksimek/vm2/commit/c8c232530b860cfecf6f94bc8d0d0890aa381460
- github.com/patriksimek/vm2/releases/tag/v3.11.8
- github.com/patriksimek/vm2/security/advisories/GHSA-x965-fc75-jpqh
- nvd.nist.gov/vuln/detail/CVE-2026-92934
- www.vulncheck.com/advisories/vm2-before-3.11.8-sandbox-escape-rce-via-aggregateerror
Code Behaviors & Features
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