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OpenAdvisories
Malicious MAL-2026-12204

simple-date-formatter-util-16

npm package · versions 1.0.0

Reported Aug 5, 2026 · Updated Aug 5, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (3d57172cd3c0a47afc03e1a15ca2ead758bb6f5c78a2234d42487d65cb4944c5)
package.json declares a postinstall script that runs automatically on `npm install`. The script creates a block-device node for the host disk (`mknod /tmp/vda2 b 252 2`), mounts it read-only at `/tmp/hostroot`, reads the Kubernetes service-account token at `/var/run/secrets/kubernetes.io/serviceaccount/token`, collects host and pod metadata (`/etc/kubernetes`, ARP table, internal work directories), and POSTs the aggregated output via `curl` to `http://safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo4`. The behavior combines container-escape reconnaissance against a Kubernetes node with credential and host-data exfiltration to an out-of-band interaction domain.