Nintendo eShop game disappears after reported Switch 2 jailbreak exploit

SmileBASIC 4 reportedly disappeared from some eShop regions after researcher used it to jailbreak Switch 2

A game on the Nintendo eShop has reportedly disappeared from several regions after a researcher used it to demonstrate a software-based jailbreak for the Nintendo Switch 2, including modifications to Mario Kart World featuring Hatsune Miku.

Sammy Hajhamid, known online as pepsipu, announced the exploit, called ns2jb, on X and published a technical explanation on his blog.

The tethered jailbreak reportedly targets Switch 2 firmware version 23.0.1 and allows arbitrary native code to run on the console.

According to Hajhamid, the exploit began with SmileBASIC 4, a coding game originally released for the first Nintendo Switch that also runs on its successor.

A flaw identified by OpenAI's Codex provided the starting point for developing the exploit, which eventually reached the console's system file service.

Hajhamid described it as, to his knowledge, the "first such exploit for the Switch 2".

For the demonstration, the researcher modified Mario Kart World to feature characters including Hatsune Miku, Cinnamoroll and Peter Griffin.

He said the modifications took one day of what he called vibecoding, while developing the jailbreak itself took approximately two weeks.

Nintendo Life reported that SmileBASIC 4 appeared to disappear from the eShop shortly after the exploit became public. TechSpot reported that the game was unavailable in the United States and Europe but remained listed in Japan.

However, it was unclear whether Nintendo or SmileBoom, the game's developer, was responsible for its removal.

Nintendo has not publicly acknowledged the reported jailbreak.

i jailbroke the nintendo switch 2

so i modded cinnamoroll, peter griffin, hatsune miku, and more into Mario Kart World, a switch 2 exclusive

now watch my friends and i get cooked by bots

learn more and get the exploit https://t.co/ykjgyfrFRp pic.twitter.com/BOcFhejRz1

— pepsipu (@pepsipu) October 22, 2026