If you are using Node.js, it's time to pay attention. A critical vulnerability has been discovered in the Brotli compression system, identified as CVE-2026-111497. This vulnerability allows attackers to execute code remotely, which can compromise the security of your server.
Required Updates
The Node.js team released updates on October 21, 2026, to fix ten vulnerabilities, including this critical flaw. The patched versions are 22.23.4, 24.22.1, and 26.12.1. Update your environment to one of these versions as soon as possible.
Impact of the Flaw
With this flaw, the security of the servers is at risk, as attackers can execute malicious commands remotely. Keeping Node.js updated is one of the ways to protect your applications and data.
Protection Measures
In addition to updating Node.js, the Vercel platform has adopted firewall rules to help protect against attacks. However, these measures do not replace the need to update the software on your servers.
Frequently Asked Questions
What is the CVE-2026-111497 vulnerability?
It is a flaw in the Brotli compression system of Node.js that allows remote code execution.
Which versions of Node.js have been patched?
The versions 22.23.4, 24.22.1, and 26.12.1 have received the necessary fixes.
What happens with version 20.x of Node.js?
Official support for version 20.x has ended, and it has not received fixes, requiring migration to updated versions.
What additional measures can I take to protect my servers?
In addition to updating Node.js, it is recommended to implement firewall rules and monitor suspicious activities.
Conclusion
Keeping your Node.js up to date is vital for the security of your servers and applications. Want to learn more about programming and security? Check out the Hcode course platform.
Source
Critical flaw in Node.js allows cyber attack and remote code execution, Estadão, October 22, 2026.