The provided sources detail the GhostAction supply chain attack, a significant cybersecurity incident affecting GitHub projects. This attack involved malicious workflow files being committed to hundreds of repositories, stealing thousands of secrets such as npm, PyPI, and DockerHub tokens. GitGuardian researchers discovered and reported on the attack, identifying its widespread nature across various programming languages and projects. While the stolen secrets pose a risk for further malicious activity, proactive measures like revoking compromised tokens and commits are recommended for affected developers to mitigate the impact. The incident highlights the importance of robust security practices in open-source ecosystems.