KICS GitHub Action Compromised: TeamPCP Strikes Again in Supply Chain Attack
The KICS GitHub Action maintained by Checkmarx was compromised by the TeamPCP threat actor on March 23, 2026, with 35 tags hijacked between 12:58–16:50 UTC. The attack was credential-stealing in nature, targeting users of the GitHub Action in their CI/CD workflows.
- Disclosed
- Last updated
- Blast radius
- GitHub Actions users relying on the KICS GitHub Action during the compromise window (12:58–16:50 UTC on March 23, 2026).
- Ecosystems
- Attack vectors
- Threat actor
- Affected entities
- KICS GitHub Action35 tags hijacked during the compromise window
The Checkmarx KICS GitHub Action was compromised as part of a supply chain attack attributed to the TeamPCP threat actor. Between 12:58 and 16:50 UTC on March 23, 2026, attackers hijacked 35 tags of the action, likely through account takeover or credential compromise.
The attack targeted users who rely on the KICS GitHub Action within their CI/CD pipelines. The malicious versions were designed to steal credentials from affected workflows, posing a risk to any secrets or authentication tokens exposed during action execution.
This incident is part of a pattern of supply chain attacks by TeamPCP targeting development tools and infrastructure. Users are advised to audit their GitHub Actions workflows, identify any malicious activity during the compromise window, and implement additional security controls around GitHub Actions usage.
Indicators of compromise
- Packages
- KICS GitHub Action
Remediation
- Audit GitHub Actions workflows for execution of the KICS GitHub Action between 12:58–16:50 UTC on March 23, 2026
- Review GitHub Actions logs and audit trails for suspicious activity or credential access during the compromise window
- Rotate any secrets, tokens, or credentials that may have been exposed to the compromised KICS GitHub Action
- Update the KICS GitHub Action to a patched version released after the compromise was discovered
- Implement GitHub Actions security best practices including pinning action versions to specific commit SHAs rather than tags
- Consider using GitHub's OIDC token provider instead of long-lived credentials in CI/CD workflows
Sources
Cite this entry
"KICS GitHub Action Compromised: TeamPCP Strikes Again in Supply Chain Attack." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed March 23, 2026; last updated June 7, 2026. https://supplychainattack.org/incident/kics-github-action-compromised-teampcp-strikes-again-in-supply-chain-attack-1jcbe8
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