Library / APPSEC
LEARNING NOTE / PR-010

Know what your application depends on

Libraries save time but add relationships your team must maintain. Make dependency reviews routine.

EDITORIAL EDITION · 2026BEGINNER FRIENDLY#dependencies#supply chain#build
At a glance

A dependency list is a map of decisions, not a one-time compliance document.

01

The working idea

A dependency list is a map of decisions, not a one-time compliance document.

The goal is not to guess the answer faster. It is to make a decision that another person can understand and repeat.

02

What to check

Keep lockfiles, review major version changes, remove unused packages, and test updates in a controlled pipeline. Assign owners to critical components.

The goal is not to guess the answer faster. It is to make a decision that another person can understand and repeat.

03

A realistic example

A package used only during builds can still influence the software you ship. Development tooling belongs in your inventory too.

Good security work usually becomes visible through notes, tests, and the questions you decide to ask next. Keep the first iteration small.

04

What to avoid

Do not blindly auto-merge every update or ignore them all; choose a tested policy.

Good security work usually becomes visible through notes, tests, and the questions you decide to ask next. Keep the first iteration small.

Try this today

List your project’s direct dependencies and identify one package nobody owns.

Good security work usually becomes visible through notes, tests, and the questions you decide to ask next. Keep the first iteration small.

A self-paced walkthrough. Nothing here requires accessing a system you do not own or have permission to test.