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conceptDevSecOps~1 min readUpdated Apr 23, 2026

Supply Chain Security

Definition

Supply chain security is the practice of reducing risk introduced by third-party code, build systems, dependencies, artifacts, signing paths, and release distribution processes.

Why it matters

Modern software is assembled from many upstream parts. DevSecOps is incomplete if it secures only first-party code while ignoring dependencies, transitive packages, build integrity, and release provenance. This note is the umbrella for the supply-chain cluster: dependency-risk covers upstream package exposure, artifact-integrity covers tamper resistance in outputs, and sbom-and-provenance covers component and build traceability.

Attacker perspective

Attackers target supply chains because one compromise can scale across many downstream consumers. Weaknesses in package trust, build systems, secrets, and artifacts can bypass strong runtime security entirely.

Defender perspective

Defenders should: - understand where software components come from - reduce unnecessary trust in upstreams - secure the build and release path - verify what is shipped, not just what is developed

Practical examples

  • a dependency update pulls in a malicious or compromised package
  • a build artifact is replaced after CI but before release
  • teams track vulnerabilities but not provenance or trust boundaries

References

  • Foundational: OWASP Software Supply Chain Security Cheat Sheet — https://cheatsheetseries.owasp.org/cheatsheets/Software_Supply_Chain_Security_Cheat_Sheet.html
  • Foundational: NIST SP 800-218 SSDF — https://csrc.nist.gov/pubs/sp/800/218/final
  • Foundational: CISA Secure by Design — https://www.cisa.gov/resources-tools/resources/secure-by-design

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