TeamPCP's Exploitation of Checkmarx GitHub Actions: A 2026 Supply Chain Attack
In March 2026, the threat actor known as TeamPCP exploited misconfigured GitHub Actions workflows maintained by Checkmarx, specifically targeting the 'checkmarx/ast-github-action' and 'checkmarx/kics-github-action' repositories. By leveraging stolen continuous integration (CI) credentials, TeamPCP injected malicious code into these workflows, leading to unauthorized access and potential data exfiltration. This breach underscores the critical importance of securing CI/CD pipelines and the risks associated with exposed credentials in cloud-native environments. The incident highlights a growing trend of cybercriminals targeting development infrastructure to propagate attacks. Organizations must prioritize the security of their software supply chains, implement robust access controls, and continuously monitor for unauthorized activities to mitigate such threats.
Kill Chain