There are no limits to the pressure when working with technology. Updates for security. Advisories from vendors. Emergency patches. The cyber war is far from abstract. It will show up in your email and on your agenda for budget meetings.
At some point in that conversation, open source has to be discussed, and there is typically only one of two ways to discuss it. Either it is discussed as the foundation of all modern technology, or it is referred to as a potential security risk waiting to explode. However, the reality of open source is much more complex than this. In fact, if you misinterpret what it means, you may make poor decisions about using it.
Treating Open Source as “Free” Software
You’ve probably heard someone say, “It’s open source, so we don’t have to pay for it.” That mindset shows up in project planning. A team selects an open source library because it reduces licensing costs. No one budgets for long-term maintenance, code review, or dedicated oversight.
In real life, this looks like a dependency aging in production. No one owns it. No one tracks updates closely. When a vulnerability is disclosed, you scramble to figure out where it’s used. The impact is not just technical. It creates stress inside your team.
You improve this by assigning ownership. Every open source component in your stack should have a responsible team. Track versions. Review maintainers. Allocate time for patching. Open source is not free of responsibility. It simply shifts where the responsibility sits.
Assuming Open Code Means Insecure Code
Another common mistake is assuming that because the code is public, it’s automatically easier to attack. That logic feels intuitive. If everyone can see the code, attackers can too.
What you forget is that defenders can see it as well. Researchers, independent contributors, and security teams around the world review popular open source projects constantly. In many cases, flaws are found and patched faster than in closed systems.
Instead of asking, “Is it open source?” you should ask, “Is it actively maintained?” Look at commit frequency. Review issue response times. Check how quickly vulnerabilities are addressed. Those signals matter more than the license model.
Ignoring the Supply Chain Reality
Modern software is layered. Your application depends on frameworks, which depend on libraries, which depend on other libraries. Much of this stack is open source.
When you ignore that reality, you create blind spots. You may secure your own code carefully while overlooking transitive dependencies. That is how supply chain attacks succeed.
In practical terms, you need visibility. Use software composition analysis tools. Generate a software bill of materials. Make dependency review part of your release process. If you read a weekly cybersecurity newsletter, you already know how often new vulnerabilities emerge. Security cannot stop at your codebase boundary.
Overlooking the Strategic Advantage
The cyber war is not just fought through firewalls or zero-day attacks. Cyber wars are also fought through governance choices, funding, and which areas of engineering to focus on. Open source is at the heart of all this. If you approach open source carelessly, you will introduce risks into your organization. If you address open source deliberately, you will be building the ability for your organization to adapt to the changing environment of cyber wars. This decision is one of a number of options you have as an IT manager; however, it is not optional.
