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Julio Bandeira de Melo (@juliobmelo) on X
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Julio Bandeira de Melo (@juliobmelo) on X

Two GitHub Actions from the actions-cool maintainer, disabled by GitHub security after May's supply-chain compromise, were reactivated by the maintainer and left accessible for over a week without the malicious release tags being cleaned up. Any workflow still referencing those version tags resumed automatically downloading and executing the Mini Shai-Hulud payload, showing that disabling a compromised action isn't remediation if the poisoned tags survive reactivation.

TL;DR Re-enabled actions-cool GitHub Actions kept serving the Mini Shai-Hulud payload for a week because their malicious release tags were never cleaned up.

Organisations named here

  • actions-cool

Technologies named here

  • actions-cool GitHub Actions repositories
  • GitHub security - disabled the compromised actions
  • GitHub Actions

Threat actors named here

  • Mini Shai-Hulud payload
  • Mini Shai-Hulud