Nintendo Switch 2 Jailbreak ns2jb Launches From SmileBASIC 4 and Used an AI Coding Assistant
Sammy Hajhamid, who publishes as pepsipu, has reported ns2jb, a jailbreak for the Nintendo Switch 2. The exploit is software-only and tethered, which means it does not persist across power cycles. It has to be launched again each time the console is turned on, and it can only be started from a game.
The entry point is SmileBASIC 4, the programming environment that lets users write and play their own games on the console. ns2jb requires that title to run the exploit. According to the Verge, Hajhamid says OpenAI's Codex helped produce the jailbreak, which means an AI coding assistant was part of the exploit development workflow.
The exploit targets Nintendo Switch 2 firmware 23.0.1. Hajhamid's blog describes that version as the current latest firmware. A copy of the ns2jb exploit is available from the ns2jb repository.
As a demonstration, a modder ran a custom version of Mario Kart World on a jailbroken Switch 2. The modified build adds playable characters including Cinnamoroll, the red Angry Bird, Peter Griffin and Steve from Minecraft. Hajhamid also posted a clip showing what the jailbreak does, and The Gamer has published that footage alongside its coverage.
Anyone who has followed console security will recognize the outline. A tethered exploit depends on its payload being re-injected at every boot, so the practical barrier is the run-from-a-game step rather than a one-time installation. The SmileBASIC 4 dependency is the more interesting constraint. Because the entry point is a legitimate, user-programmable application rather than a memory-corruption bug (a flaw that lets an attacker overwrite data a program should not touch) triggered by an arbitrary file, the chain relies on a feature Nintendo ships deliberately. Whether that dependency is durable depends on what later firmware changes.
In my view, the Codex detail deserves more attention than it will probably get. Exploit development has long rewarded deep, patient reverse engineering, and a publicly stated AI assist raises a familiar question about how much of that labor can now be compressed. A single reported case does not establish a trend, but it is a concrete data point for anyone tracking how security researchers and tinkerers use coding models.
The broader context here is the long-running cat-and-mouse between console makers and the homebrew community. Each jailbreak opens space for hobbyists to run their own code, from emulators and custom games to modding tools, and each firmware update narrows it again. ns2jb is notable for how quickly it reaches a working state, and for its reliance on a programmable software environment that users are meant to have. What that enables, for hobbyists and for the next generation of tinkerers learning to program on these devices, is the part I find most worth watching.
