Supply chain · npm · High

Critical npm package 'app-node-layer' leads to full system compromise

Threat Engine Auto-Feed · data current as of 2026-07-24

A malicious npm package, 'app-node-layer', has been identified as malware. Its installation results in full system compromise, necessitating immediate secret rotation and thorough remediation due to potential persistent access.

  • Package: npm / app-node-layer
  • Affected versions: >= 0
  • Severity: critical
  • Reach: ~0/wk
  • Exposure: 60/100 (High)

What happened — Credential / secret theft

The npm package 'app-node-layer' contains malware. Installation of this package leads to a complete compromise of the host system, giving an external entity full control.

How the attack works

This is a malicious package attack where an adversary publishes a harmful package to a public registry. When developers or automated systems integrate this package into their projects, the malicious code executes during installation or runtime, compromising the host environment. This specific package is designed for credential/secret theft, indicating it likely attempts to exfiltrate sensitive information upon execution.

Who's exposed

Profiles most at risk

  • Development teams using the npm ecosystem
  • CI/CD pipelines that pull unpinned or latest versions of dependencies
  • Organizations with internal package mirrors that may have ingested this package

Conditions that increase exposure

  • Unpinned dependencies in package.json (e.g., using '*' or 'latest')
  • Lack of package-lock.json or yarn.lock to ensure consistent dependency versions
  • Automated build systems that install dependencies without strict versioning or integrity checks
  • Direct or transitive dependency on 'app-node-layer'

Blast-radius scenarios

  • An attacker gains full control over the compromised system, potentially leading to data exfiltration, further lateral movement within the network, or resource abuse.
  • All secrets and keys stored on the compromised computer are at risk of theft, enabling attackers to access other systems or services.
  • The integrity of development environments and build artifacts is compromised, potentially introducing backdoors into legitimate software.

What to do (defensive)

Detect

  • Scan dependency trees for the presence of 'app-node-layer' in any project.
  • Monitor network traffic for unusual outbound connections from development or build systems.
  • Review system logs for unexpected process execution or file modifications on machines that installed npm packages recently.

Contain

  • Immediately isolate any system identified as having installed 'app-node-layer' from the network.
  • Suspend all CI/CD pipelines that might be pulling this package.
  • Block 'app-node-layer' from being downloaded from public registries or internal mirrors.

Remediate

  • Consider any system that installed 'app-node-layer' as fully compromised and rebuild it from a trusted image.
  • Rotate all secrets, API keys, and credentials that were stored on or accessible from the compromised systems, using a different, trusted computer.
  • Force-update all dependencies to known good, pinned versions and implement strict integrity checks (e.g., `npm ci` with a lockfile).

Frontier verdict — High

Prioritize immediate investigation and remediation for 'app-node-layer' due to critical severity and full system compromise.

Sources

For detection-engineering and awareness only · point-in-time · not security advice · sourced from the GitHub Advisory Database.