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A critical sandbox escape vulnerability has been disclosed in the popular vm2 Node.js library that, if successfully exploited, could allow attackers to run arbitrary code on the underlying operating system. The vulnerability, tracked as CVE-2026-22709, carries a CVSS score of 9.8 out of 10.0 on the CVSS scoring system. "In vm2 for version 3.10.0, Promise.prototype.then Promise.prototype.catch

Threat actors with ties to China have been observed using an updated version of a backdoor called COOLCLIENT in cyber espionage attacks in 2025 to facilitate comprehensive data theft from infected endpoints. The activity has been attributed to Mustang Panda (aka Earth Preta, Fireant, HoneyMyte, Polaris, and Twill Typhoon) with the intrusions primarily directed against government entities located