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Secure web apps: what really matters in 2026
From threat modeling to hardening the pipeline — a hands-on overview of what secure web development takes today.
Security is not a feature you add at the end — it is a property that emerges in every phase of development. Taking it seriously starts at the data model and ends at deployment.
Threat modeling from day one
Before the first line of code is written, it pays to ask: what can go wrong? Who might attack, and what would the target be? This exercise costs hours and saves weeks.
- Treat all input as untrusted by default.
- Never keep secrets in code — always in the environment.
- Least privilege for every service and token.
The most expensive vulnerability is the one nobody saw coming — because nobody asked.
A hardened pipeline automatically checks dependencies, secrets and permissions.
# Secrets nie committen
export API_TOKEN=$(vault read secret/api)
docker run --read-only --cap-drop=ALL app