vm2 Sandbox Escape via SuppressedError Exception Handling

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.0, SuppressedError allows attackers to escape the sandbox and run arbitrary code. This issue has been patched in version 3.11.0.

Casky was already ahead

This CVE exploits attack patterns that Casky's 301matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

vm2 is a widely-used Node.js sandbox library designed to safely execute untrusted code in isolated environments. This critical vulnerability (CVSS 9.8) allows attackers to break out of the sandbox entirely by exploiting improper handling of SuppressedError exceptions, enabling arbitrary code execution on the host system. Organizations using vm2 for code execution, plugin systems, worker processes, or any security-sensitive sandboxing are directly affected—including development platforms, CI/CD systems, and applications that execute user-supplied scripts.

Casky's 301 matched skills leverage Claude AI's extended reasoning to correlate this exploit with MITRE ATT&CK techniques TA0001 (Reconnaissance) and TA0043 (Reconnaissance via Resource Development). Practitioners using Casky would detect attack patterns including: exception-based sandbox bypass attempts (CWE-94: Improper Control of Generation of Code), detection of error object manipulation in Node.js contexts, and identification of privilege escalation payloads that exploit error handling chains. The platform maps these behavioral indicators across the full kill chain, flagging suspicious SuppressedError instantiation, prototype chain pollution attempts, and code execution calls originating from supposedly isolated contexts—providing defenders with precise, technique-aligned detection logic beyond signature-based approaches.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

301 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-26332.

analyzing-apt-group-with-mitre-navigator

threat intelligence · low

Run

analyzing-campaign-attribution-evidence

threat intelligence · low

Run

analyzing-certificate-transparency-for-phishing

threat intelligence · low

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-26332

Casky has 301 skills that investigate the attack patterns behind CVE-2026-26332. Run one and get CVSS-scored findings in 3 minutes.

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