Vm2 - CraftedSignal Threat Feed

Multiple Vulnerabilities in vm2

hello@craftedsignal.io — Tue, 19 May 2026 10:48:06 +0000

Multiple vulnerabilities exist within the vm2 library, a sandbox environment for Node.js. A remote, anonymous attacker can exploit these vulnerabilities to achieve critical impacts, including arbitrary code execution within the host environment, bypassing security restrictions enforced by the sandbox, manipulating data processed within the sandbox, and disclosing sensitive information accessible to the sandbox. The specifics of the vulnerabilities are not detailed in this brief but the broad impact suggests that attackers could potentially compromise systems relying on vm2 for secure code execution, leading to significant data breaches or system control.

Attack Chain

An attacker crafts malicious code designed to exploit a vulnerability within the vm2 sandbox.
This malicious code is submitted for execution within the vm2 environment.
The vm2 sandbox attempts to isolate the malicious code, but a vulnerability allows the code to escape the intended boundaries.
The attacker's code leverages the vulnerability to execute arbitrary commands on the host system, outside the confines of the vm2 sandbox.
The attacker gains control of the host process or system, escalating privileges as needed.
The attacker manipulates data and discloses sensitive information accessible to the host system.
The attacker uses compromised host system to move laterally within the network.

Impact

Successful exploitation of these vm2 vulnerabilities could lead to arbitrary code execution on systems using the library, security bypass, data manipulation, and sensitive information disclosure. This could result in significant data breaches, system compromise, and potential lateral movement within a network. The lack of specific details prevents quantifying the number of potential victims or targeted sectors, but the severity is deemed critical due to the potential for complete system compromise.

Recommendation

Upgrade to the latest version of vm2 to address known vulnerabilities as soon as patches are available from the maintainers.
Deploy the Sigma rules provided to detect potential exploitation attempts within your environment.
Closely monitor systems utilizing vm2 for any anomalous behavior, focusing on process execution and network connections.

vm2 Vulnerability Allows Code Execution

hello@craftedsignal.io — Mon, 11 May 2026 10:48:49 +0000

A vulnerability in vm2, a JavaScript sandbox, allows a remote attacker to execute arbitrary code. The vulnerability, discovered in May 2026, stems from insufficient isolation between the sandboxed environment and the host system. An attacker could potentially leverage this flaw to escape the sandbox and execute arbitrary commands, leading to complete system compromise. This is particularly concerning for applications that rely on vm2 to execute untrusted JavaScript code, as it could allow malicious code to break free and compromise the underlying infrastructure. The vulnerability is present in unspecified versions of vm2.

Attack Chain

An attacker crafts malicious JavaScript code designed to exploit the vm2 vulnerability.
The attacker delivers the malicious JavaScript code to a server or application that utilizes vm2 for sandboxed execution.
The vm2 sandbox attempts to execute the malicious code.
Due to the vulnerability, the malicious code bypasses the intended security restrictions of the sandbox.
The malicious code gains unauthorized access to the underlying Node.js environment.
The attacker executes arbitrary code within the Node.js process, outside the intended sandbox.
The attacker leverages the code execution to perform actions such as reading sensitive data or establishing persistence.
The attacker potentially compromises the entire host system, depending on the privileges of the Node.js process.

Impact

Successful exploitation of this vulnerability allows an attacker to execute arbitrary code on the host system where vm2 is being used. This can lead to complete system compromise, data theft, and denial of service. The number of potential victims is broad, as many applications utilize vm2 to safely execute untrusted JavaScript. The impact is severe, potentially allowing attackers to gain control of critical infrastructure.

Recommendation

Implement detection rules to identify suspicious activity related to vm2 execution, focusing on attempts to escape the sandbox environment (see Sigma rule examples below).
Closely monitor the execution of vm2 sandboxes for unexpected behavior such as file system access or network connections originating from the sandbox.

Multiple Vulnerabilities in vm2 Sandbox

hello@craftedsignal.io — Tue, 05 May 2026 08:06:10 +0000

The vm2 sandbox environment contains multiple unspecified vulnerabilities that can be exploited by malicious actors. These vulnerabilities, when successfully exploited, can lead to arbitrary code execution within the host environment, denial-of-service conditions, sensitive information disclosure, and the circumvention of existing security precautions. While the specific details of the vulnerabilities are not provided, the potential impact necessitates immediate attention from development and security teams utilizing vm2. It is imperative to investigate and apply any available patches or mitigations to prevent potential exploitation. The broad nature of the possible exploits makes this a critical issue for any application leveraging vm2.

Attack Chain

An attacker crafts malicious JavaScript code designed to exploit a vulnerability within the vm2 sandbox.
The malicious code is injected into the vm2 environment, possibly through a vulnerable application that uses vm2 to execute untrusted code.
The vm2 sandbox fails to properly isolate the malicious code due to a security flaw.
The attacker leverages the vulnerability to escape the vm2 sandbox environment.
Arbitrary code execution is achieved on the host system outside the vm2 sandbox.
The attacker installs a backdoor or establishes persistence on the compromised host.
The attacker performs lateral movement to other systems on the network.
The attacker exfiltrates sensitive data or launches a denial-of-service attack.

Impact

Successful exploitation of these vulnerabilities can result in complete compromise of the host system, potentially impacting all data and services hosted on the affected machine. If the compromised system has network access, the attacker can pivot to other systems, increasing the scope of the attack. This could lead to widespread data breaches, service disruptions, and reputational damage. Without specifics on victim count or affected sectors, the risk remains high for any organization utilizing vm2 without proper mitigation.

Recommendation

Immediately investigate the applications using vm2 to understand potential attack vectors.
Monitor application logs for unexpected behavior indicative of sandbox escape attempts.
Deploy the Sigma rules provided below to detect potential exploitation attempts within your environment.