July 17, 2026
FREE COMMUNITY SESSION: FILE UPLOAD ATTACKS — NULL BYTE INJECTION, DOUBLE EXTENSIONS & RCE
🔐 One weak filter. One uploaded file. Full server takeover.
By Dallen Sadru
1 min read
Most developers think file upload validation is a solved problem. It's not and it's one of the most exploited attack surfaces in production web applications today.
On Saturday, 18th July 2026, AstralGuard is hosting a free, live technical session breaking down exactly how file upload vulnerabilities lead to Remote Code Execution and how to stop it before it happens to your application.
What we'll cover: 🔹 File Upload Attacks how weak validation logic (blacklists, MIME trust, extension parsing) opens the door to exploitation 🔹 Double Extension Attacks how filenames can bypass filters and get executed as code instead of served as images 🔹 Null Byte Injection the technique that broke early filename validation, why it worked, and why understanding legacy attack classes still matters for secure development today 🔹 Remote Code Execution (RCE) the full exploitation chain, live, in an isolated lab environment from upload to execution to what it can mean for full server compromise 🔹 Developer Mistakes the real, common patterns in production code that create these vulnerabilities in the first place 🔹 Defensive Engineering practical, actionable mitigations: proper whitelisting, content verification, server-level hardening, and secure upload architecture
Why this matters: Whether you write the code, secure it, or break it for a living understanding this attack class from both sides makes you better at your job.
This session is built to leave you with real, applicable knowledge, not just theory.
Who should attend: ✅ Developers who want to secure their own applications ✅ Cybersecurity students building practical, hands-on skills ✅ Security professionals looking for a sharp technical refresher ✅ Anyone curious about how real-world exploitation actually works
No prior offensive security experience required. Just bring curiosity.
📅 Date: Saturday, 18th July 2026 🕞 Time: 3:30 PM EAT 📍 Platform: Google Meet 🔗 Join link: available at https://meet.google.com/gye-bttr-aip
Free. Open to everyone. Limited only by how many people show up ready to learn. Save the date. Bring a colleague. See you there. 🚀