Modern software rarely comes from a single source. Applications can include open-source libraries, third-party components, APIs, cloud services, development tools and externally managed platforms.
This interconnected environment creates new security challenges. A vulnerability in one component can affect applications that depend on it, even when the organisation did not develop that component itself. As a result, software supply chain security has become an important consideration for CIOs and technology leaders.
The focus is shifting from securing only internally developed code to understanding the wider ecosystem behind business applications.
Why Is the Software Supply Chain Difficult to Secure?
Modern development depends on many external components. Developers may use open-source packages, third-party APIs, software frameworks, containers and cloud services to build applications faster.
While these components improve development efficiency, they can also introduce security risks.
A vulnerability in a widely used library, for example, could affect multiple applications across different environments. Organisations may not immediately know which applications depend on the affected component.
This makes visibility a central requirement of software supply chain security.
What Should CIOs Know About Third-Party Components?
CIOs should have a clear understanding of the software and services used across the organisation.
This includes knowing which vendors provide critical components, what applications depend on them, how those components are updated and what security practices suppliers follow.
Vendor assessments should therefore go beyond contractual and performance requirements. Security controls, vulnerability management, software development practices and incident response capabilities should also be considered.
How Does Open-Source Software Affect Security?
Open-source software is widely used because it can accelerate development and provide access to established technologies.
However, open-source components still need to be monitored and managed. Some may become outdated, contain vulnerabilities, or no longer receive active maintenance.
Technology teams should maintain visibility into the components used within applications and establish processes for identifying and addressing security issues.
This is a key part of effective software supply chain security.
Why Is Software Bill of Materials Important?
A Software Bill of Materials, or SBOM, provides information about the components included in a software application.
For technology leaders, an SBOM can improve visibility into dependencies. If a vulnerability is discovered in a specific component, teams can use this information to determine which applications may be affected.
However, an SBOM should be treated as part of a broader security process rather than a standalone solution.
It can support software supply chain security by helping organisations understand what exists within their application environment.
What Role Does the Development Process Play?
Security should be considered throughout the software development lifecycle.
Development teams can introduce security checks during code creation, testing, dependency management, deployment and maintenance. Automated tools can also help identify vulnerable dependencies before applications reach production.
At the same time, security teams need to work closely with developers rather than treating application security as a separate activity.
What Should CIOs Prioritise?
CIOs should focus on visibility, accountability, risk prioritisation and collaboration.
Organisations need to know which software components support critical business applications and which suppliers present the greatest potential risk.
They should also establish processes for vulnerability response and supplier communication.
The goal of software supply chain security is not to eliminate every external dependency. Instead, it is to understand those dependencies and manage their associated risks effectively.
Final Thought
Software ecosystems will continue to become more interconnected. Open-source components, cloud platforms, third-party services and external development tools will remain important to modern application delivery.
For CIOs, software supply chain security should therefore become part of broader technology risk management. Better visibility into software components, stronger supplier oversight and security throughout the development lifecycle can help organisations reduce exposure while continuing to innovate.