May 27 - June 24, 2026

Introducing: Dune Phantom

Following previous Gauntlet missions, Dune Phantom introduces a new series of weekly machine drops built around real-world attack and defense scenarios. Each challenge is structured and task-based, allowing you to earn points through flag submissions while tracking your progress on a live global leaderboard. With over $45,000 in prizes up for grabs, the top 50 players on the leaderboard will also earn a share of the prize pool.

Adapt. Endure. Restore truth.

Dune Phantom continues the fast-track format with a four-week sprint. New challenges, evolving difficulty, and a persistent adversary ensure the pressure never stays the same.

Whether this is your first CTF or your next proving ground, The Gauntlet rewards learning, persistence, and adaptation.

The Gauntlet is OffSec's free, seasonal capture the flag event designed to test real-world offensive and defensive security skills under pressure.

Countdown to Dune Phantom

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Season 3: May 27 - June 24, 2026

Register now to:

Lock in your free spot for Dune Phantom
Get early access + exclusive launch updates
Be the first to enter when Dune Phantom drops

This event is open to all OffSec accounts. If you're already registered, you can sign in here .

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Welcome to Dune Phantom

A phantom stalks the sands, launching mirage-like cyber attacks that distort what defenders trust most: the integrity of their data. Alerts flicker without cause. Logs contradict themselves. Evidence appears, then disappears.

Systems that provided clarity become traps built on deception.

Restoring truth is the only way to win

In this Gauntlet season, you'll be dropped into escalating defensive scenarios where the objective is no longer just detection, but validation. Rebuild trust in compromised systems as the phantom's tactics evolve each week.

Uncover the pattern and confront the source.