What is a software supply chain attack?
Published on 2026-10-17 by frfrand
Cómo se puede comprometer una aplicación a través de paquetes, dependencias o proveedores de confianza y cómo reducir el riesgo.
You review your code, configure the firewall, and protect your passwords. Everything seems correct. But your application uses a library you downloaded from the Internet. What if that library changes ownership, is updated with malicious code, or was published by someone impersonating its creator?
A software supply chain attack exploits the trust we place in components, tools, or providers used to build and operate our applications.
Why is it called a supply chain?
A bakery can prepare its recipe perfectly, but it depends on the quality of the flour, transportation, and those who deliver ingredients. If one of those steps fails, the problem reaches the final product.
Something similar happens in programming. Your application depends on packages, container images, external services, build tools, and updates from other projects.
No one needs to gain direct access to your server if they manage to compromise a piece of software that you then install with trust.
Three ways it can happen
A compromised dependency. A legitimate package can end up distributing a harmful update if the account of its maintainer is compromised.
A fake package. Someone publishes a name similar to a well-known library. If a person makes a mistake when installing it, they can incorporate unwanted software.
A build process tool. The problem can also appear during the stages that prepare and publish an application, even if the code in the main repository has not changed.
Not all provider failures are attacks. The difference lies in whether there is a malicious action and which part of the chain has been affected.
Why is it so difficult to detect?
Because reusing external components is normal and necessary. No one wants to write a library from scratch to read JSON files every time they build an application.
In modern projects, there can be hundreds of dependencies, including others installed indirectly. Reviewing them all manually would be an enormous task.
The solution is not to stop using third-party code. It is knowing where it comes from, what permissions it needs, and what changes we are incorporating.
How to reduce risk in practice?
First, keep an inventory of the dependencies your project actually uses. Version lock files help make installations more reproducible.
Second, verify packages and their sources before incorporating them, especially when the name is very similar to a well-known tool or the repository appears abandoned.
Third, protect Git accounts, package registries, and CI/CD systems with robust authentication and limited permissions.
Fourth, review security alerts and updates. It is not about updating everything blindly: important changes deserve testing before reaching production.
Fifth, limit what the process that builds your software can do. Automation should not have permanent access to all passwords and servers in your organization if it only needs to publish an application.
An easy example to imagine
A company installs a library to generate reports. Months later, that dependency introduces a compromised version. The next deployment automatically downloads the new version.
The company could have a well-configured firewall and still run dangerous code, because the program entered through an allowed installation process.
What does this have to do with ArduMaker?
Git deployments and applications hosted on ArduMaker can also depend on external packages, as happens in any development environment. It is advisable to run tests, review dependencies, and control what credentials installation and deployment processes receive.
In summary: the security of your application does not end with the code you wrote. It also depends on the trust and controls you apply to everything you incorporate from outside.
To keep learning: consult the security recommendations of the package ecosystem and the official guides of the tool providers used by your project.