CVE-2025-27210

Overview

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It offers an event-driven, non-blocking I/O model that makes it lightweight and efficient, and is widely used in web applications and server-side development.

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A Path Traversal vulnerability has been identified in Node.js on Windows. An incomplete fix has been identified for CVE-2025-23084 in Node.js, specifically affecting Windows device names like CON, PRN, and AUX.
This vulnerability affects Windows users of path.join API.

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This vulnerability affects specific versions of the package and can result in Path Traversal. Details on affected versions and reproduction steps are provided below.

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Details

Module Info

• ‍Affected packages: Node.js‍
• Affected versions: 4.0 < 20.19.4, 22 < 22.17.1, 24 < 24.4.1‍
• GitHub repository: https://github.com/nodejs/node‍
• Published packages: https://github.com/nodejs/node/releases‍
• Package manager: npm‍
• Fixed in: Node.js NES version v12, v14, v16, v18, v20
  

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Vulnerability Info

In a scenario where an attacker sends a malicious url, the system may fail to handle the device name correctly, leading to a Path Traversal.

This vulnerability is a result of flawed logic, and may allow attackers to completely disrupt the service.

- https://nodejs.org/en/blog/vulnerability/july-2025-security-releases

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Mitigation

This vulnerability is not fixed upstream due to the release line being EOL. Herodevs has issued patched builds under the NES (Never Ending Support) line.

- Update to a patched LTS version of Node.js

- Leverage a commercial support partner like HeroDevs for post-EOL security.

Refer to the NES documentation for upgrade instructions.

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Credits

• oblivionsage