Nl Blog Banner 38 We are counting down to SymfonyCon Warsaw 2026, taking place on November 26-27, 2026, in Warsaw (Poland)! Get ready for a week full of workshops, sessions, and community magic.


🎤 Speaker announcements

Make sure not to miss Ramona Schwering, Developer Relations Engineer, mittwald for her talk "Why AI Output Is the New XSS":

"Developers know one golden rule: never use innerHTML on user input. Yet, as we're integrating Large Language Models (LLMs) into our applications, we often make a fatal mistake. We're treating AI output as a trusted source. This is fine. Well, not automatically....

Let’s look at OWASP LLM05 and how "Improper Output Handling" affects web security. Therefore, let's discuss examples of how safe inputs can trick models, leading to vulnerabilities such as XSS and injection attacks. By the end, you’ll learn how to be "professionally pessimistic" for AI. You’ll see how to sanitize LLM data, safely render Markdown, and manage AI-generated content. Let's approach technology with caution, I look forward to exploring this with you! ❤️"

Click here to see more talks — the full schedule will be unveiled step-by-step over the coming weeks. Stay tuned!

Ready to join us?

🏨 Accommodation

The official conference hotel offers special preferential rates and flexible conditions for our attendees. Make sure to use our dedicated link to book your room and stay right where the action happens!

🥳 Save the date for the Community Party!

Because SymfonyCon isn't just about code, we are happy to confirm that our traditional Community Party will take place on the evening of Thursday, November 26. Get ready for a great night of networking, fun, and connecting with peers!

💻 Hackday

Ready to contribute? The Hackday on Saturday, November 28 (free and open to all!) will take place at "The Brain Embassy - Czackiego" thanks to the support of Baksla.sh. Bring your laptop and your good mood!

🎟️ Get your tickets

Regular tickets are available now, but don't wait too long. secure your ticket today


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