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containedcritical

Malicious code in gantt-for-react (npm)

The npm account `atool` was compromised and used to publish 631 malicious versions across 314 npm packages, including gantt-for-react, as part of the "Mini Shai-Hulud" supply chain attack campaign. Each malicious version injects a preinstall hook executing an obfuscated Bun script that exfiltrates credentials and establishes persistence via CI/CD workflow injection and system daemons.

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Disclosed
Last updated
Blast radius
631 malicious versions across 314 npm packages; widespread credential exfiltration affecting AWS, GitHub, npm, GCP, Azure, Kubernetes, SSH, Docker, databases, Stripe, and Slack
Ecosystems
npmOther
Attack vectors
Account takeoverCompromised packageMalicious commit
Threat actor
Mini Shai Hulud
Affected entities
  • gantt-for-reactnpm package compromised with malicious preinstall hook

A threat actor compromised the npm account atool and published 631 malicious versions across 314 npm packages in a 22-minute automated burst, part of the "Mini Shai-Hulud" supply chain attack campaign. The gantt-for-react package was among those modified to include a malicious preinstall hook.

Each malicious version executes a 498KB obfuscated Bun script that exfiltrates sensitive credentials including AWS keys, GitHub PATs, npm tokens, GCP service accounts, Azure credentials, Kubernetes service account tokens, SSH keys, Docker auth configs, database connection strings, Stripe keys, and Slack tokens. The script uses the GitHub API as a covert exfiltration channel, committing stolen data to attacker-controlled repositories following Dune-themed naming patterns (e.g., harkonnen-melange-742).

Beyond credential theft, the malicious packages establish persistence through CI/CD workflow injection (a GitHub Actions workflow named Run Copilot that dumps all secrets via toJSON(secrets)) and a system daemon named kitty-monitor. The attack was confirmed by multiple security sources including Amazon Inspector and Google Open Source Security.

This incident represents a large-scale, automated supply chain compromise with broad impact across the npm ecosystem and downstream CI/CD environments.

Indicators of compromise

Packages
  • gantt-for-react

Remediation

  • Immediately revoke all credentials (AWS keys, GitHub PATs, npm tokens, GCP service accounts, Azure credentials, Kubernetes tokens, SSH keys, Docker auth configs, database credentials, Stripe keys, Slack tokens) that may have been exposed
  • Audit and remove any GitHub Actions workflows named 'Run Copilot' or similar suspicious workflows from affected repositories
  • Search for and remove the 'kitty-monitor' system daemon from all affected systems
  • Update gantt-for-react and all other affected packages to patched versions once available
  • Review npm account security and enable multi-factor authentication on npm accounts
  • Audit CI/CD logs and GitHub Actions execution history for evidence of secret exfiltration
  • Monitor for unauthorized access to cloud accounts, repositories, and services using the exfiltrated credentials

Sources

  1. GitHub Advisory GHSA-v2mr-5wmj-q99m · GitHub Advisory Database

Cite this entry

"Malicious code in gantt-for-react (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 27, 2026; last updated July 27, 2026. https://supplychainattack.org/incident/malicious-code-in-gantt-for-react-npm-4gbh2d

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