What is sbom
Last updated: April 1, 2026
Key Facts
- SBOM lists all software components and dependencies included in an application or software product
- Essential for identifying known vulnerabilities in third-party components and dependencies
- Standard formats include SPDX, CycloneDX, and SWID tags for documenting software components
- U.S. government and regulatory bodies increasingly require SBOMs for software procurement and security
- SBOMs help organizations track licensing compliance and manage software supply chain risks
Definition and Purpose
A Software Bill of Materials (SBOM) is a comprehensive inventory of all software components, dependencies, libraries, and modules that comprise a software application. Similar to a bill of materials used in manufacturing, an SBOM provides transparency about what software components are included in a product and how they are organized.
Why SBOM Matters
Software security and compliance have become critical concerns for organizations. An SBOM helps address these concerns by identifying known vulnerabilities in dependencies and third-party components, tracking licensing compliance requirements, managing supply chain security risks, supporting incident response when vulnerabilities are discovered, and providing transparency to customers and stakeholders.
SBOM Formats and Standards
SPDX (Software Package Data Exchange) is an open-source standard maintained by the Linux Foundation that provides a common format for SBOM creation. CycloneDX is another popular format designed specifically for security and DevOps use cases. SWID (Software Identification) tags offer another approach to documenting software components in a standardized way.
Regulatory Requirements
Governments and regulatory bodies increasingly require SBOMs for software products. The U.S. Executive Order on Cybersecurity mandates that government software purchases include SBOMs. This trend is expected to expand to broader sectors, making SBOM creation an essential practice for software developers and organizations.
Creating and Managing SBOMs
Automated tools can scan code repositories and generate SBOMs, though manual review is often necessary for accuracy. Organizations should include SBOM generation in their CI/CD pipelines to keep inventories current as software evolves and dependencies are updated. Regular SBOM maintenance ensures that security teams can quickly respond to newly discovered vulnerabilities.
Related Questions
What are the main SBOM formats?
The three primary SBOM formats are SPDX (maintained by the Linux Foundation), CycloneDX (optimized for security), and SWID tags (for software identification). Each format has specific strengths depending on use cases and organizational needs.
Why do government agencies require SBOMs?
Government agencies require SBOMs to improve software supply chain security and identify vulnerable components. This requirement helps prevent cyberattacks and ensures better visibility into the software being used by government agencies.
How do I generate an SBOM for my software?
You can generate SBOMs using automated tools like Syft, CycloneDX Maven Plugin, or SPDX-Maven-Plugin. Many tools integrate directly into CI/CD pipelines to automatically generate and maintain SBOMs as your codebase evolves.
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Sources
- Wikipedia - Software Bill of Materials CC-BY-SA-4.0
- NTIA - Software Bill of Materials Public Domain