@caliperx2/componentsnpm
@caliperx2/components is a confirmed malicious npm package (MAL-2026-16007) that steals credentials and exfiltrates sensitive data. Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in @caliperx2/components (npm)
What this malware does
This package is malicious. It is not a real library. An attacker put it on the public npm registry. The package name is a copy of a private, internal package name. This is a dependency confusion attack. A build that gets the name from public npm installs this package in place of the real one.
The package.json has a preinstall script. npm runs this script during install. The script file is preinstall.js. It runs before a person can read the code.
The script collects data about the host. It reads the host name, the user name, the current directory, the install directory, the package name, the package version, the operating system, the Node.js version, and the npm user-agent text.
The script sends this data to remote servers. It uses three ways. First, it makes a DNS request to a subdomain of oast.online. It writes the token, the package name, the host name, and the user name into the DNS name as hex text. Second, it sends an HTTPS POST with the data as JSON to the same oast.online host. If HTTPS fails, it uses plain HTTP. Third, it sends an HTTP POST with the same JSON to a fixed IP address, 5.189.159.252. The beacon uses a fixed token, caliperx2-4d5f8e2a9b1c.
The code comments say this is authorized bug-bounty research. The behavior is still an unwanted install-time beacon. It sends host data to attacker-controlled servers without consent. All versions are malicious. Treat every host that installed this package as exposed. Remove the package. Look for DNS and HTTP traffic to the listed servers.
Malicious versions
Every published version of this package is considered malicious — remove it entirely.
Detection & response playbook
Credential / info stealerFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for @caliperx2/components (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @caliperx2/components across your stack and pipelines.
If you installed it — respond
@caliperx2/components is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If @caliperx2/components was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks @caliperx2/components before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
References
Credits
- SafeDep · finder
Detect & block this
O3 blocks @caliperx2/components-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.