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Sedat Özdemir
Sedat Özdemir

I work on security engineering. Everything I learn ends up here.

I have spent close to a decade on the offensive side: offensive AI development, web, internal network, mobile and API penetration testing, red team work and DevSecOps. Everything here is based on public vulnerability reports and experiments in my own lab — these are personal notes. Enjoy the read.

Writing

161 posts · page 7 / 14

The Trojan in Our Pockets: The Illusion of 'Security' in Mobile Apps

Mobile security is a different beast altogether. Your code isn't behind a firewall; it's sitting in the attacker's living room. Let's talk about why 'hardcoded' is a dirty word and how SSL Pinning isn't the silver bullet you think it is.

May 10, 2026·3 dk readandroid-pentestfridamobile-security

The Day You Exposed Kube-apiserver to the Internet, You Handed Over the Keys to Your Cluster

If you aren't seeing 401 or 403 errors in your logs, you're either not being targeted or you're already compromised. Let's dive into the dirty realities of Kubernetes security and how to harden your cluster.

May 9, 2026·4 dk readcloud-nativedevsecopshardening

Zero-Day: The Art of Living with an Unpatchable Nightmare

Facing a vulnerability with no signature, no patch, and no known pattern is a wake-up call for any security pro. Here is a look into the reality of zero-days from the perspective of the Red Team kitchen.

May 8, 2026·4 dk readcybersecurityexploitredteam

The Dumb Security of Smart Homes: Why Are We Still Living in the 1990s in the IoT World?

Is Shodan really everything? In this piece, we dive into why the IoT ecosystem feels like the Wild West, exploring MQTT vulnerabilities and the 'geeky' reality of firmware analysis from a Red Teamer's perspective.

May 6, 2026·4 dk readfirmwarehardwarehackingiotsecurity

The Keyless Lock of Invisible Doors: Why 'IDOR' is Just the Tip of the Iceberg in Modern API Security

A deep dive into the shift from monoliths to microservices and how logic flaws like BOLA have become the new frontier for Red Team operations.

May 5, 2026·4 dk readapisecuritybolaidor

When the Foundations Crumble: Software Supply Chain and 'Dependency Hell'

Think you're safe behind your firewall? Think again. The real threat might be that 'npm install' you just ran. Let's dive into the messy world of Software Supply Chain attacks and how they turn your trust against you.

May 4, 2026·4 dk readcybersecuritydependency-confusiondevsecops

Kubernetes: Orchestration Magic or a Trojan Horse Within?

Is your K8s cluster a secure fortress or just a playground for attackers? Let's dive into API server security, RBAC pitfalls, and why Base64 isn't encryption.

May 3, 2026·4 dk readcontainer-securitydevsecopsk8s-security

Trusting Your Package Manager? Feeding a Trojan Horse in the Supply Chain

Think your CI/CD pipeline is safe because of a few SCA scans? Think again. We’re diving into the blind spots of package managers, from malicious logic to dependency confusion.

May 2, 2026·4 dk readappsecdependency-confusiondevsecops

Is the Ship Sinking? Lost Security Between Container Layers and Lessons from the Field

Let’s debunk the myth that containers are inherently secure. From root user illusions to supply chain risks, I’m diving into why your 'isolated' environments might be more vulnerable than you think.

May 1, 2026·4 dk readcontainer-securitydevsecopsdocker

Ghost in the Terminal: Unconventional Penetration Testing Scenarios and Real-World Defense

A deep dive into the Red Teamer mindset: why your security is only as strong as your forgotten legacy server, moving beyond automated tools to explore RCE via misconfigurations, and the art of lateral movement.

April 30, 2026·4 dk readcybersecuritydefensive-hardeningoffensive-security

Loosening the Prison Bars: Docker Escape and the Art of Defense

A deep dive into why privileged containers are a Red Teamer's dream, how to spot escape routes like the Docker socket, and the right way to harden your containerized infrastructure.

April 29, 2026·4 dk readcontainer-securitydevsecopsdocker-escape

JSON’s Backdoor: The Forgotten 'Logic' and Invisible Threats in API Security

Modern security isn't just about blocking scripts; it's about understanding the logic of your APIs. Let's dive into why WAFs aren't enough when your business logic is broken.

April 28, 2026·3 dk readapi-securitybolacybersecurity