@nimbusedge2/authxsas

{"modified":"2026-09-21T03:07:04Z","published":"2026-09-21T03:07:04Z","schema_version":"1.7.4","id":"MAL-2026-16303","summary":"Malicious code in @nimbusedge2/authxsas (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (0146259024cc8ef3a174ff98571fe4af975b3eecf9184a0a5339d42808243d10)\nThe 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.\n","affected":[{"package":{"ecosystem":"npm","name":"@nimbusedge2/authxsas"},"versions":["1.1.0"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"package.json","sha256":"4ec4a0153134528a3599d806665bb975f1793628746e4604d77a790f7364674c","tlsh":"45e0c02815107c772dcdc7e0b675032976b07b1f4e80ae1c9093091c1e2d9de3a23f44"}],"package_integrity":[{"filename":"authxsas-1.1.0.tgz","hashes":{"sha1":"0193d18e3e795cf71d83895f9d9100d243420c72","sha512_sri":"sha512-6BlFoBJp8Tyk6nHgUY/U3Vf8Z/NCs422QP7XprUIXx9m9ScPzZSxazx/nQcW8Qpl3/IrLC+Sn40Pqzg3t7Nsxg=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@nimbusedge2/authxsas/v/1.1.0"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-020202","import_time":"2026-09-21T03:24:20.9568188Z","modified_time":"2026-09-21T03:07:04Z","sha256":"0146259024cc8ef3a174ff98571fe4af975b3eecf9184a0a5339d42808243d10","source":"amazon-inspector","versions":["1.1.0"]}]}}