vm2 SuppressedError Sandbox Escape
CVE-2026-26332 is a critical sandbox escape vulnerability in the vm2 Node.js sandbox library affecting versions up to and including 3.10.4, and more generally described as versions prior to 3.11.0. The flaw is caused by improper handling of the JavaScript SuppressedError object associated with Explicit Resource Management features such as DisposableStack. vm2 failed to correctly sanitize or proxy this object across the sandbox boundary, allowing sandboxed code to reach host-realm constructors. Reported exploitation uses a DisposableStack to trigger a SuppressedError and then accesses the chain e.suppressed.constructor.constructor, which resolves to the host Function constructor rather than the sandboxed one. With access to the host Function constructor, attacker-controlled code can break out of the vm2 isolation boundary and execute arbitrary JavaScript in the host context, including loading sensitive Node.js functionality such as child_process.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical vm2 sandbox escape vulnerability leveraging DisposableStack and SuppressedError behavior in Node.js v24 to expose the host Function object.
A critical vm2 sandbox escape vulnerability via SuppressedError that can lead to arbitrary code execution on the host.
A sandbox escape and arbitrary code execution vulnerability in vm2 for Node.js caused by SuppressedError, affecting versions prior to 3.11.0.
A critical sandbox escape and remote code execution vulnerability in the vm2 Node.js package caused by improper handling of the JavaScript SuppressedError object, allowing attackers to access the host Function constructor and execute arbitrary commands on the host.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.