Nintendo Switch 2 Jailbroken for the First Time

The Nintendo Switch 2 has received its first reported software-based jailbreak, with pepsipu (Sammy Hajhamid), a security researcher and undergraduate student at Caltech, using OpenAI Codex to help develop the exploit. The jailbreak enables homebrew software, game modifications, and save-file backups.

The project, named ns2jb, was documented on Oct. 18, 2026, and demonstrated publicly on Oct. 22 through modifications to Mario Kart World.

The exploit reportedly works on firmware version 23.0.1 but remains tethered, requiring users to repeat the process whenever the console restarts. Its development highlights how AI-assisted coding can accelerate vulnerability research, although a permanent jailbreak remains out of reach.

How the Nintendo Switch 2 Jailbreak Works

The exploit uses ‘SmileBASIC 4,’ a backward-compatible original Nintendo Switch game, to establish code execution. Codex identified a 32-bit integer overflow in the game's array-handling logic. The developer subsequently exploited a buffer overflow in the Switch 2's filesystem service to gain privileged access and execute native code within system modules.

The setup included both Switch consoles, two JetKVM devices for remote controller input and video capture, and a Bluetooth-controlled switch mechanism to restart the Switch 2 after crashes.

Pepsipu noted that the jailbreak required “substantial effort” over approximately two weeks. The modder created the Mario Kart World modifications in a single day, adding characters such as Hatsune Miku, Peter Griffin, and Cinnamoroll.

Homebrew Opportunities and Jailbreak Limitations

The vulnerability enables homebrew development, game reverse engineering, access to most console peripherals, and save-file backups. Still, it does not yet provide permanent custom firmware. Users must reactivate the exploit after each reboot, and its reliance on a specific older game limits accessibility.

The discovery follows earlier attempts to compromise the console through its browser and backward-compatibility features. Nintendo previously detected and banned users exploiting adapted Switch game cartridges.

The modder's latest method is reported to evade the console's online checks, yet broader testing and independent confirmation remain important.

What the Discovery Means for Nintendo

Unlike the original Switch's unpatchable hardware vulnerability on affected launch models, ns2jb relies on software weaknesses that Nintendo could potentially address through updates.

The vulnerability could expand homebrew development and enable technical investigations into the console's hardware and graphics capabilities, including its implementation of NVIDIA DLSS. However, the current discovery does not establish widespread piracy or a permanent jailbreak.

Nintendo has not yet responded publicly to the jailbreak.