Fix dot-access npm CVE-2026-107700 to prevent attackers from executing OS commands on Node.js servers

The npm package dot-access, versions 0.0.3 through 1.0.0, contains a critical code injection vulnerability that allows remote attackers to execute arbitrary operating system commands. According to the National Vulnerability Database, the flaw is tracked as CVE-2026-107700 and has been assigned a CVSS score of 9.3, classified as critical.

The vulnerability stems from how the package handles path inputs within its index.js file. When a user supplies a crafted path to the get() function, the input is concatenated directly into a new Function body. This design flaw allows an attacker to manipulate the code execution flow. By exploiting this mechanism, a remote attacker can traverse the JavaScript prototype chain to reach constructor.constructor. This access point allows the injection of code that loads the child_process module, a core Node.js component used for spawning processes. Once loaded, the attacker can run operating system commands within the context of the Node.js process, potentially gaining full control of the server.

Technical Mechanism and Impact

The core issue is identified as CWE-94, or Improper Control of Generation of Code ('Code Injection'). The specific weakness lies in the lack of sanitization or validation of the path argument passed to the get() method. Instead of treating the input as data, the application treats it as executable code by embedding it in a Function constructor. This technique is particularly dangerous in Node.js environments because the process often runs with sufficient privileges to interact with the host operating system.

According to the NVD record, the exploitation does not require authentication. A remote attacker only needs to supply a specifically crafted path to the vulnerable function. The ability to load child_process and execute OS commands means the impact extends beyond simple data theft. An attacker could modify files, install malware, pivot to other systems on the network, or disrupt service availability. The severity rating of 9.3 reflects the high likelihood of exploitation and the significant impact on confidentiality, integrity, and availability.

Affected Components and Scope

The vulnerability affects the dot-access package published by the vendor ntharim. Specifically, all versions from 0.0.3 up to and including 1.0.0 are vulnerable. Small-business owners and developers using Node.js applications that depend on this library for object property access or path manipulation are at risk. The package is often used to simplify accessing nested properties in JavaScript objects, making it a common dependency in various web applications and backend services.

Organizations should audit their Node.js projects to identify any direct or transitive dependencies on dot-access. Even if the package is not used directly, it may be included as a sub-dependency of other libraries. The widespread use of npm packages in modern web development means that the attack surface can be larger than initially apparent. Identifying the presence of vulnerable versions is the first step in mitigating the risk.

What to watch

Security researchers and system administrators should monitor vendor announcements for an official patch or updated version of the dot-access package. Until a fix is confirmed and deployed, systems running vulnerable versions remain exposed to remote code execution attacks. Network monitoring tools should be configured to detect unusual outbound connections or process spawns that may indicate exploitation. Developers should also review their code for any direct usage of the get() function with user-controlled inputs to assess immediate exposure.

Background: Malware

Malware targets small businesses because they lack layered defenses. You must isolate sensitive data, restrict software execution, and verify IT provider backup integrity. Focus on reducing the attack surface through strict access controls and regular, offline data restoration tests.

Read the full guide: Malware Defense: Practical Steps for Small Business Security

What to do and how to stay safe: dot-access

• Audit your Node.js project dependencies to identify if dot-access versions 0.0.3 through 1.0.0 are installed directly or as transitive dependencies.
• Restrict network access for Node.js servers to limit the potential impact if an attacker successfully executes commands on the host.
• Monitor system logs and process activity for unexpected execution of operating system commands or access to the child_process module.
• Once the vendor provides an update, test the new version in a staging environment before deploying it to production to ensure compatibility.

Step-by-step guide: How Security Advisories Drive Patch Decisions and Reduce Risk

General security guidance from the Shell Bulletin newsroom. It is not confirmed advice from the organisations named in this story.

Frequently asked questions

What is CVE-2026-107700?

CVE-2026-107700 is a critical code injection vulnerability in the dot-access npm package that allows remote attackers to execute operating system commands.

Which versions of dot-access are affected?

Versions 0.0.3 through 1.0.0 of the dot-access package are affected by this vulnerability.

How do attackers exploit this flaw?

Attackers supply crafted paths to the get() function, which are concatenated into a Function body, allowing them to load child_process and run OS commands.