Malicious code in @nimbusedge2/authxsas1 (npm)
Exploitation and risk
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osv · MAL-2026-16304
Published--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (0b27280b8f4c1e044e49b77e58c7c8de895a002f51be51756bc40e909d3f6fa1) package.json declares a preinstall lifecycle script that runs automatically on `npm install`. The script uses curl to fetch the cloud instance metadata service (169.254.169.254, accessed via the nip.io wildcard-DNS wrapper `169.254.169.254.nip.io/latest/meta-data/`), base64-encodes the response, and POSTs it to a hardcoded third-party endpoint at http://canarytokens.com/terms/7dc94zmd3so67n5vbz5bxmt7v/contact.php. On cloud and CI installers this discloses instance identity metadata and, where IMDSv1 is reachable, temporary IAM credentials to the destination. The package's description field self-labels the beacon as an 'Authorized report' with a wearehackerone.com contact address; that label is author-controlled and does not change the behavior class — installing the package causes installer-side host and cloud metadata to be sent off-host to a canarytoken beacon.
- Source published
- 21 Sep 2026 03:06:48 UTC
- Source modified
- 21 Sep 2026 03:30:17 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.