The npm package rc had versions published with malicious code.
Full advisory text at GitHub advisory.
npm package report
Is rc safe?
Version 1.2.9 of rc was compromised (credential stealer); other versions are not flagged as malicious. CyberXYZ Proxy blocks the affected versions. It also has 1 known vulnerability, the worst rated CRITICAL.
Do not install rc 1.2.9
CRITICALanalyst verifiedCredential stealer, part of the NPM Credential Theft Campaign 2021 campaign. Added to CyberXYZ 2021-11-04, verified by a CyberXYZ analyst.
// what we observed
Compromised package stealing npm credentials. Coordinated attack with coa. Inject malicious postinstall script.
- attack vector
- compromised_maintainer
// versions and what to do
- Malicious
- 1.2.9
- Move to
- 1.2.8 newest 1.x release, no known advisory
Remove immediately. Rotate npm tokens. Check for unauthorized package publishes.
npm install rc@1.2.8
// reach
0 direct dependencies
none carry a known advisory
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.
cvss
9.0
critical
severity band, no base score published
epss
not scored
chance of exploitation in 30 days
xyz score
5.1
medium
CyberXYZ composite out of 10
fig. 01 — GHSA-g2q5-5433-rhrf, the advisory selected below
// 1 advisories
Is rc safe to install?
Version 1.2.9 of rc was compromised (credential stealer). Other versions are not flagged as malicious.
Does rc have known vulnerabilities?
Yes. CyberXYZ records 1 known vulnerability for rc (npm), the worst rated CRITICAL. They are GHSA-g2q5-5433-rhrf.
Which version of rc should I use?
Use 1.2.8 or a later release that is not named as malicious. Versions named on this report as malicious must not be installed.
How do I check rc before installing?
Search rc in CyberXYZ Check at https://cyberxyz.io/check?q=rc. The xyz Scanner checks a project's dependencies, and CyberXYZ Proxy checks each package as it is installed.
Checked 2026-11-14 at 07:03 UTC. The most recent advisory here was published 2021-11-04. Updated continuously from NVD, GHSA, OSV and CNA feeds.