Summary: A critical vulnerability (CVE-2026-1022) in a widely used Jenkins artifact management plugin is being exploited to replace legitimate software builds with malware-laden versions. The attack, dubbed “ArtifactJack,” occurs post-build but pre-deployment, making it invisible to source code scanners.
Business Impact: Supply Chain Compromise. This allows attackers to distribute malware to your customers *signed with your own valid digital certificate*. It is the digital equivalent of poisoning food after it leaves the kitchen but before it reaches the table.
Why It Happened: The plugin failed to validate the integrity of artifacts moving between the build agent and the master node, allowing a Man-in-the-Middle (MitM) swap within the internal network.
Recommended Executive Action: Implement “Binary Signing” immediately *at the build stage*, not the release stage. Ensure that your deployment scripts verify the hash of the artifact against the original build hash before pushing to production.
Hashtags: #Jenkins #CICD #SupplyChainAttack #DevSecOps #ArtifactJack #CVE20261022