Seokchan Yoon

I'm Seokchan Yoon, and I am an offensive web security researcher and auditor. I currently work at Zellic, where I focus on auditing Web2 infrastructure that underpins Web3 systems. In addition, I serve as a Security Team member of Apache Airflow, contributing to securing one of the most widely used workflow platforms.

Over the years, I have disclosed vulnerabilities and CVEs across major open-source ecosystems such as Django, Apache Airflow, Python, Ruby on Rails, and Spring. I have also participated in the global security community through CTF competitions, most recently as a finalist at DEF CON 33 CTF.

Beyond vulnerability research, I actively share my findings with the community. I have spoken at PyCon Korea 2024 and CODEGATE 2023, where I presented practical insights on exploiting and defending against framework-specific security weaknesses.

More about my work can be found on my portfolio: https://ch4n3.kr