CVE-2026-26956criticalCWE-653 CWE-693

vm2: WASM Sandbox Escape (Node 25 only)

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.8epss 0.9%

exploitation probability

0.9%top 43% of all CVEs

observed exploitation

nono source reports it

vm2 is an open source vm/sandbox for Node.js. In version 3.10.4, vm2 is vulnerable to full sandbox escape with arbitrary code execution. Attacker code inside VM.run() obtains host process object and runs host commands with zero host cooperation. This issue has been patched in version 3.10.5.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

patriksimek · vm2

References

https://access.redhat.com/security/cve/CVE-2026-26956 https://bugzilla.redhat.com/show_bug.cgi?id=2466548 https://github.com/patriksimek/vm2/releases/tag/v3.10.5 https://github.com/patriksimek/vm2/security/advisories/GHSA-ffh4-j6h5-pg66 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26956.json