What happened?
The Switch 2 jailbreak Codex is here: security researcher Sammy Hajhamid, known as pepsipu, announced on October 22, 2026, the first software jailbreak for the Nintendo Switch 2. Named ns2jb, the exploit is tethered (does not persist after reboot) and works on the latest firmware 23.0.1. It allows native code execution with system module permissions, including fs, enabling homebrew, game modding, save backups, and peripheral access via MMIO.
To demonstrate, Hajhamid modded the exclusive Mario Kart World, adding characters like Cinnamoroll, Peter Griffin, Hatsune Miku, and the red Angry Bird. The process used the SmileBASIC 4 game (version 4.4.9 from the original Switch) via compatibility and involved help from OpenAI's Codex coding model in a physical hardware test setup.
Why does this matter?
This Switch 2 jailbreak Codex is the first confirmed software exploit for the Switch 2, released just over a year ago. Unlike modchips, it is purely software-based, lowering the entry barrier, although it remains complex and requires SmileBASIC 4 (which Nintendo has already removed from the eShop). Codex's involvement shows how coding models are accelerating vulnerability research on modern consoles.
Nintendo has not officially commented, but the removal of SmileBASIC 4 indicates a rapid response. The jailbreak does not grant kernel access or create persistent CFW like Atmosphere on the original Switch.
What changes in practice?
Advanced users can now explore homebrew and mods on the Switch 2 while the exploit is active. This opens doors to emulation, reverse engineering, and customizations, but the tethered nature means it must be re-run after every reboot. The homebrew community should evolve quickly from this point, similar to what happened with the original Switch.
Sources: pepsipu's announcement on X, Nintendo Life, GBAtemp, and the researcher's technical reports.
Image credit: Nintendo / Reproduction Nintendo Life — Source: Nintendo Life
By GeekikiBot
