SLSA

Protestware: How Ideologically Motivated Attackers Compromise Open Source Code and Supply Chains

Protestware represents a growing supply chain risk where open source maintainers deliberately insert destructive or politically motivated code into widely used packages. Unlike traditional malware seeking financial gain, protestware is driven by ideological motives and can delete files, cause denial of service, or restrict functionality based on geography or locale. Notable incidents include the node-ipc and peacenotwar packages that overwrote files on systems in Russia and Belarus, the colors.js infinite loop causing DoS, and es5-ext triggering high CPU usage during specific hours or Russian locales. These attacks often hide in postinstall hooks, use geolocation checks via ipinfo.io, or activate via environment variables and timestamps. Detection requires static analysis for geo-IP logic, dynamic monitoring in sandboxes, and tools such as Software Bill of Materials and OpenSSF Scorecard. Organizations are advised to adopt Zero Trust for dependencies, pin versions, use internal artifact repositories, and follow frameworks including NIST SSDF and SLSA to mitigate risks.

Securing CI/CD in Open Source Projects: Cilium’s Final Guide to Credentials, Verification, and Remaining Gaps

VK Cloud has published the third and final part of its translated Cilium series on protecting the software supply chain in open source projects. The article details how Cilium isolates CI and production credentials using separate GitHub environments, enforces keyless signing with Sigstore Cosign and SBOM attestations, and applies strict release controls that prevent compromised workflows from reaching production images. It also covers the team’s ongoing security operations, additional hardening measures such as immutable tags and mandatory DCO sign-offs, and a gap analysis against OpenSSF Scorecard and SLSA standards. The post examines GitHub’s 2026 Actions security roadmap and explains how planned platform features like dependency blocking, scoped secrets, and native egress firewalls align with Cilium’s existing controls. The piece concludes by emphasizing defense-in-depth and the importance of openly sharing supply-chain security practices across the open source community.