CVE-2026-100722vm2 before 3.12.2 Host Process Termination via Construct Trap
Updated under an hour ago ()
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It affects patriksimek vm2. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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vm2 before 3.12.2 does not apply host-side Promise rejection handling in the sandbox-to-host construct trap. In BaseHandler, the apply trap calls markHostPromiseHandled() on the returned value, but the adjacent construct path returns the result of Reflect.construct without the same sanitization. If an embedder exposes a constructable host function whose constructor returns a native rejected Promise, an untrusted script executed via VM.run can invoke it with `new` and ignore the result; the rejected host Promise crosses the bridge unhandled and, under Node's strict unhandled-rejection policy, is promoted to an uncaught exception that terminates the host process.
- CVSS
- 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
- Weakness (CWE)
- CWE-248
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
patriksimek vm2 patriksimek:vm2 (from the name) | before 3.12.2; 3.12.2 not affected | CNA record |
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-2v2p-6j97-cjg9vendor-advisory
- https://www.vulncheck.com/advisories/vm2-before-3.12.2-host-process-termination-via-construct-trapthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.