Malicious code in @nimbusedge2/authxsas (npm)
Exploitation and risk
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osv · MAL-2026-16303
Published--- _-= Per source details. Do not edit below this line.=-_ ## 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.
- Source published
- 21 Sep 2026 03:07:04 UTC
- Source modified
- 21 Sep 2026 03:30:16 UTC
- Saved here
- 24 Oct 2026 13:17:17 UTC
- Source terms
- OSV · upstream source license applies
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.