This indicates an attack attempt to exploit a Command Injection Vulnerability in NodeJS.
The vulnerability is due to an input validation error while parsing a crafted request to a specific port. A remote attacker could exploit this to execute arbitrary code within the context of the target application, via sending a crafted request to specific port.
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor. Or follow the workaround in below link.