vm2 is a sandbox that can run untrusted code with Node's built-in modules. In versions 3.9.17 and lower of vm2 it was possible to get a read-write reference to the node inspect
method and edit options for console.log
. As a result a threat actor can edit options for the console.log
command. This vulnerability was patched in the release of version 3.9.18
of vm2
. Users are advised to upgrade. Users unable to upgrade may make the inspect
method readonly with vm.readonly(inspect)
after creating a vm.