DOS security vulnerability, October 2017

October 17th, 2017


The Node.js project will be releasing new versions of 4.x, 6.x, and 8.x the week of the 24th of October to incorporate a security fix.

Denial of Service Vulnerability

Versions 4.8.2 and later, 6.10.2 and later, as well as all versions of 8.x are vulnerable to an issue that can be used by an external attacker to cause a denial of service. The severity of this vulnerability is HIGH and users of the affected version should plan to upgrade when a fix is made available.


Versions 4.8.2 and later of Node.js are vulnerable.
Versions 6.10.2 and later of Node.js are vulnerable.
Versions 8.x of Node.js are vulnerable.

Release timing

Releases will be available at, or shortly after, the 24th of October along with disclosure of the details for the vulnerability in order to allow for complete impact assessment by users.

Contact and future updates

The current Node.js security policy can be found at

Please contact if you wish to report a vulnerability in Node.js.

Subscribe to the low-volume announcement-only nodejs-sec mailing list at!forum/nodejs-sec to stay up to date on security vulnerabilities and security-related releases of Node.js and the projects maintained in the nodejs GitHub organisation.