VYPR

npm · Malicious package advisory

Malware

@nimbusedge2/authxsas

MAL-2026-16303

Malicious code in @nimbusedge2/authxsas (npm)

Details


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## Source: amazon-inspector (0146259024cc8ef3a174ff98571fe4af975b3eecf9184a0a5339d42808243d10)
The package's package.json declares a preinstall script that fires unconditionally on `npm install`. The script uses curl to query the cloud instance metadata service via the nip.io wildcard-DNS resolver (169.254.169.254.nip.io/latest/meta-data/), base64-encodes the response, and POSTs it over plain HTTP to a hardcoded canarytokens.com endpoint (http://canarytokens.com/terms/7dc94zmd3so67n5vbz5bxmt7v/contact.php). On installers running on AWS/GCP/Azure hosts with IMDS reachable, this leaks IAM role identifiers and, on IMDSv1, temporary cloud credentials to a third-party canary endpoint at install time. The tarball ships no source files; the manifest and its preinstall hook are the entire payload. The scope name and package name are consistent with a dependency-confusion / SSRF canary probe targeting an internal namespace.

Compromised versions (1)

  • 1.1.0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.