Recurity Labs Founder Felix “FX” Lindner Passes Away at 43

The security community lost a towering figure this week with the passing of Felix "FX" Lindner, founder and owner of Recurity Labs, who died on March 1, 2026 at the age of 43.

Recurity Labs announced the news in a heartfelt statement that captured both the professional and personal impact Lindner had on those around him. "For many of us, Felix wasn't only the person who built this company—he was the person who shaped how we think and how we work: with curiosity, discipline, and the kind of honesty that respects both the challenge and the people behind it," the team wrote.

Lindner was widely known in cybersecurity circles for his technical expertise and principled approach to security research. His influence extended far beyond Recurity Labs, where he established a culture emphasizing "real-world impact over hype, careful analysis over shortcuts, and clear words over vague promises."

Those who worked with Lindner describe him as a mentor, teacher, and collaborator who brought both technical depth and human understanding to his work. "Inside Recurity Labs, Felix was a constant reminder that security is ultimately about people," his team noted. "He cared deeply about doing things properly—technically, ethically, and humanly."

The loss reverberates through the broader security community where Lindner was a familiar presence at conferences and collaborative projects. His approach to security research—combining rigorous technical analysis with practical outcomes and ethical considerations—helped shape how many practitioners approach their work today.

Despite the profound loss, Recurity Labs has committed to continuing operations in accordance with Lindner's wishes. "We will keep doing the kind of security work that FX rooted into Recurity Labs—deep technical excellence, practical outcomes, and respectful, long-term relationships," the team stated.

The firm has opened a channel for those wishing to share memories or condolences, directing messages to [email protected], where they will be collected and shared with Lindner's family and the team.

Lindner's passing at such a relatively young age represents a significant loss for the cybersecurity field, where his combination of technical brilliance, ethical grounding, and human-centered approach helped define a generation of security research and practice.