npm package report

Is birch-css-utils safe?

Confirmed malicious. Do not install it, and remove it where it has been installed.

Do not install this package

CRITICAL

Tarball ships a file byte-identical to known malware (cross-signal auto). Added to CyberXYZ 2026-10-25, OSV malicious-package feed (Google / OpenSSF).

// what we observed

file identical to known malware+70
index.mjs is byte-identical to known malware (sha256 d7f2e6126f30199d791c30c52560c06205640a26ea17ceb53a06231be653d976 = confirmed_scan:noelc-css-blender@2.1.9(noelc-css-blender), confirmed_scan:noelc-css-bl)
package contents+8
source finding (sev 10)
obfuscation medium+5
Obfuscation score=50 (medium) in build-cache.mjs — triggered long_base64_payload,many_base64_chunks,very_long_string

// versions and what to do

Malicious: all versions

Remove it from every machine and lockfile it reached. Treat any credentials, tokens and SSH keys present on those machines as exposed and rotate them. Check CI runners and container images that installed it.

npm uninstall birch-css-utils

OSV record

// reach

0 direct dependencies

none carry a known advisory

0 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 2026-11-08 at 22:09 UTC. Updated continuously from NVD, GHSA, OSV and CNA feeds.