CyberXYZ does not call a package safe in absolute terms. It records 1 known vulnerability for deep-extend (npm), the worst rated CRITICAL, and no malicious-package signal. Whether it is acceptable depends on the version you run.
Does deep-extend have known vulnerabilities?
Yes. CyberXYZ records 1 known vulnerability for deep-extend (npm), the worst rated CRITICAL. They are GHSA-hr2v-3952-633q.
Which version of deep-extend should I use?
0.5.1 or later clears every advisory recorded for deep-extend (npm). Check the release you pick before installing it.
How do I check deep-extend before installing?
Search deep-extend in CyberXYZ Check at https://cyberxyz.io/check?q=deep-extend. The xyz Scanner checks a project's dependencies, and CyberXYZ Proxy checks each package as it is installed.
Checked 2026-11-14 at 07:04 UTC. The most recent advisory here was published 2018-10-09. Updated continuously from NVD, GHSA, OSV and CNA feeds.