New Checkmarx supply-chain breach affects KICS analysis tool
What happened
Researchers found Checkmarx KICS Docker images and VS Code/Open VSX extensions were trojanized to deploy a credential-theft component targeting developer environments. The malicious window was narrow and tied to pushed Docker tags and extension addons; investigators recommend pinning SHAs, reverting to safe versions, and rotating secrets. Watch whether other scanner tools or extension ecosystems show the same propagation technique
Buyer takeaway
Treat this as an operational supplier/tooling failure requiring immediate containment and tightened vendor attestations for tooling provenance
Cost / money
Expect near-term remediation and secret-rotation costs and potential follow-up audit spend for build pipelines
Supplier / commercial
Tooling and extension publishers may pursue liability carve-outs or reduced quote windows; buyers should predefine acceptance and remediation terms
Safety / operations
Credential exfiltration from developer environments increases uptime risk for build and deploy pipelines and can enable broader cloud compromise
What to watch
Watch for similar compromises across other open-source scanners, Docker images, and popular editor-extension ecosystems
Key facts
- Trojanized Docker image tags pushed to official checkmarx/kics repository
- Malware targeted GitHub tokens, cloud credentials, npm tokens, SSH keys, and environment vari
- VSCode and Open VSX extensions carried a hidden addon fetching the credential-stealing component
Source excerpts
js. According to the researchers, the malware targets precisely the data processed by KICS, including GitHub tokens, cloud (AWS, Azure, Google Cloud) credentials, npm tokens, SSH keys, Claude configs, and environment variables
Dependency security company Socket investigated the incident after receiving an alert from Docker about malicious images pushed to the official checkmarx/kics Docker Hub repository. The investigation revealed that the compromise extended beyond the trojanized KICS Docker image to VS Code and Open VSX extensions that downloaded a hidden 'MCP addon' feature designed to fetch the secret-stealing malware
64. 0, and Checkmarx Developer Assist extension v1
