When a vulnerability surfaces in a widely used open source library, the first question your security team asks is: “Are we affected?” Without a software bill of materials, answering that question can take days. With one, it takes minutes.
Software supply chain security has become a board-level priority. A software bill of materials (SBOM) sits at the center of that shift. If you know what’s inside your software before something goes wrong, you can respond faster. Without an SBOM, you’re scrambling to trace dependencies after an incident has already begun.
What Is a Software Bill of Materials?
A software bill of materials (SBOM) is a formal, machine-readable record of every software component in an application. Think of it as a nutritional label for code.
An SBOM lists the libraries, packages, and software dependencies used to build a software product. It includes metadata for each component: version numbers, origins, and open-source license information. Modern software draws on dozens, sometimes hundreds, of discrete components. An SBOM documents all of them in a single, queryable record.
SBOMs became a formal policy priority in 2021. The Biden administration’s executive order on improving national cybersecurity made SBOMs central to federal software procurement requirements. Shortly after, the National Telecommunications and Information Administration published guidance on minimum elements for a software bill of materials. That guidance established the baseline shaping SBOM adoption across public and private sectors today.
Why the Complexity of Modern Software Makes This Necessary
Developers do not build modern software applications from scratch. They assemble them from open-source, third-party, and proprietary components. Each carries its own version history, patch cadence, and license obligations.
The software supply chain compounds this further. Each dependency may rely on components no one on your development team has ever audited. A single application can contain hundreds of transitive dependencies your team never directly selected or reviewed.
Attackers exploit that opacity. The SolarWinds breach showed how a flaw in one widely used package could propagate through the supply chain. Log4Shell did the same. Organizations with no direct relationship to the original vendor were still affected.
Security teams now treat both as defining examples of software supply chain attacks. Without an SBOM, your team can spend days tracing what’s running after a Common Vulnerabilities and Exposures (CVE) drops. That delay gives threat actors a window to strike.
An SBOM closes that gap. It gives your security team a complete software inventory they can query the moment a new CVE is disclosed, not days later.
If your team manages dozens or hundreds of vendors, TITAN Watch extends that visibility outward with real-time monitoring across your entire vendor ecosystem. A vulnerability in a third-party package does not go undetected until it’s too late.
SBOM Formats and What Goes Inside One
Two SBOM formats dominate today. The Linux Foundation developed SPDX, the Software Package Data Exchange standard, with a focus on license compliance alongside security. The CycloneDX project built its format specifically for vulnerability management, making it a more practical fit for security-focused teams. The right choice depends on how your team plans to consume and distribute SBOM data downstream.
The National Telecommunications and Information Administration’s minimum elements guidance defines what every SBOM should contain. Software component transparency is the core objective. At a minimum, each SBOM entry should include:
- Supplier name and software component name
- Version and unique software identification string
- Dependency relationships within the software
- The author of the SBOM data entry
An SBOM is not just a list of files. It is a structured map of how software dependencies relate to each other. A well-maintained SBOM lets your security team query the entire software inventory in seconds when a new vulnerability surfaces.
How Organizations Use SBOMs Across the Software Supply Chain
An SBOM provides the foundation for several downstream activities in software supply chain management. Risk and license obligations tied to inherited components do not disappear. SBOMs make them visible and trackable. Both your security and legal teams gain a shared reference for what is running and what governance applies to it.
SBOMs Also Reshape Software Procurement
Requiring SBOMs before software enters your environment gives procurement teams real transparency into what they’re buying. It shifts security earlier in the development process. Software producers go on record about what components make up their product. That accountability follows the software throughout its lifecycle.
Federal agencies and enterprise buyers have begun treating SBOM availability as a baseline procurement requirement. The case for requiring SBOMs in any regulated environment grows stronger every quarter.
Integrating SBOM Processes Into Third-Party Risk Management
Software security and supply chain risk management converge most clearly here. When a vendor’s software depends on components with known weaknesses, that risk does not stay contained. It travels to every organization that depends on that software.
SecurityScorecard’s TITAN AI platform adds a layer that SBOM tooling alone cannot provide. TITAN AI has rated more than12 million organizations and collects 27 billion data points per week. It surfaces exposure across your entire vendor ecosystem, including third-party relationships that questionnaires and point-in-time assessments miss entirely.
Sharing SBOM Data With Stakeholders
SBOM data should be available to stakeholders throughout your supply chain, not locked inside your security team’s tooling. When software vendors share SBOM information as part of standard delivery, you can query it against your own vulnerability feeds. Your entire software ecosystem benefits. That is software transparency at scale.
If you want to secure your software supply chain, you need SBOM generation embedded in your build process from the start. The SBOM should accompany every release. It gives customers a current view of what makes up the software product at any point in time.
Building an SBOM Program That Holds Up
Start by agreeing on scope. Some teams build SBOMs for every application in production from day one. Others begin with their most critical projects and expand from there. The second approach works better in practice. It gives your team time to refine SBOM workflows before scaling adoption across the full software ecosystem.
SBOM tools range from open-source options to commercial platforms built for enterprise scale. The right tools automate SBOM generation throughout the software development lifecycle, keeping inventories current without manual intervention.
Security teams increasingly treat the SBOM as a standard artifact of the build process, not an optional compliance document. SBOM requirements are tightening across regulated industries and federal contracting. Teams with embedded SBOM processes will face far less friction. Those treating SBOM creation as a one-time exercise will not.
Every software component is a potential entry point. Teams with a current, accurate software inventory are positioned to act when something goes wrong — before it becomes a breach.
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