About me

👾 CaptainJack

Vulnerability Researcher

반복은 천재를 낳고 믿음은 기적을 만든다.

Web/App Pentesting Vulnerability Research Exploit Development


About me

I am a security professional with over 4 years of hands-on experience in Penetration Testing (Web/App/CS), currently expanding my focus into Vulnerability Research (VR) and Exploit Development.

My current research focuses on identifying structural flaws, analyzing 1-day vulnerabilities, and gaining a deeper understanding of low-level system internals.

🛡️ Open Source Vulnerability Contributions

ProjectTypeSeverityCVELink
JoplinDoS (Resource Alloc.)Moderate (5.5)CVE-2025-57798Advisory
Bento4Heap OOB ReadModerate (self)CVE-2026-38232Issue #1060
ChafaInteger Overflow → OOB Writev1.18.2
NokogiriMemory Leak (XSLT)Moderate (5.3)Advisory

Core Skills

Offensive · Penetration Testing (Web/App/CS)
Low-level · Memory Corruption (OOB / Integer Overflow / Memory Leak)


📫 Contact


🔐 PGP Public Key

For encrypted vulnerability reports, or to verify my signatures.

Fingerprint · B453 F46C A2A6 CE45 8E75 9F69 6936 6438 8D83 A64F

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