npm package report

Is is safe?

Versions 3.3.1 and 5.0.0 of is were compromised. Other versions are not flagged as malicious.

Do not install is 3.3.1 or 5.0.0

CRITICAL

Compromised releases. Added to CyberXYZ 2025-07-22, OSV malicious-package feed (Google / OpenSSF).

// what we observed

"is" had unauthorized new versions published that contained malicious obfuscated code via account compromise.

Reported by Google Open Source Security via OSV.

// versions and what to do

Malicious: 3.3.1, 5.0.0
Move to: 3.3.2 newest 3.x release, no known advisory

If one of these versions was installed, remove it and treat the credentials, tokens and SSH keys on that machine as exposed: rotate them. Check CI runners and container images that installed it too.

npm install is@3.3.2

OSV record fix commit

// reach

0 direct dependencies

none carry a known advisory

14 packages depend on it

an advisory here reaches each of them

Create a free accountfor every dependency path, dependent and what to upgrade

// ai model usage

Tracked for PyPI packages. HuggingFace models declare Python dependencies, so npm packages are not covered.

Checked 2026-10-31 at 00:01 UTC. Updated continuously from NVD, GHSA, OSV and CNA feeds.