Nintendo has released firmware version 23.5.0 for the Switch 2 and the original Switch model, patching the first public jailbreak targeting the newer console hardware according to BornCity.
Security researcher OatmealDome established that the update closes the exploited operating system vulnerability, thereby subduing the dumping of game data and modifications to titles, though exceptions temporarily remain for select upcoming cartridge games and prospective software updates.
Ns2jb Jailbreak Exploits Integer Overflow in SmileBASIC 4
Published on October 22, 2026, by security researcher Sammy Hajhamid under the pseudonym “pepsipu”, the “ns2jb” jailbreak was developed with the assistance of OpenAI Codex. The method exploited a 32-bit integer overflow in the application SmileBASIC 4 and within the console’s file service. Functioning completely without hardware interventions under firmware 23.0.1, the tethered jailbreak required execution following every console restart.
It granted users the capacity to launch custom programs, back up game saves, analyze game code, and apply modifications, although it did not permit full system control or the installation of a modified firmware. Nintendo required 18 days to supply the patch, and while SmileBASIC 4 was previously removed preemptively from the digital eShop, Nintendo issued no official confirmation of the exploit.
Modders Deploy Mario Kart World Modification and Extract Game Files
Shortly after the jailbreak’s release, modders demonstrated its deployment, producing a modification for Mario Kart World that incorporated characters such as Hatsune Miku, Peter Griffin, Cinnamoroll, and Sonic into the title. Zudem wurden Spieldateien diverser Neuerscheinungen extrahiert, darunter Donkey Kong Bananza, Splatoon Raiders, Pokopia und Deltarune.
Zudem wurde das Zelda: Ocarina of Time Remake vorab kopiert und lief bereits vor der Markteinführung auf PCs sowie ab dem Verkaufsstart nativ auf Mac- und iPhone-Geräten mit ARM64-Architektur bei 60 Bildern pro Sekunde.
Concurrently, platform experts from gbatemp cautioned that the current update burns an electronic fuse (e-Fuse), causing a fracture in the file system on the original Switch and blocking softmods on Mariko models alongside the Atmosphere custom firmware.
[Switch 2] The OS exploit used in the recent jailbreak has been patched in version 23.5.0. Dumping and modding games will be impossible again from this point forward, with the exception of some cartridge games (and maybe game updates) that are released in the near future.
System Update 23.5.0 Enables Nintendo eShop Gifting Function
Published on November 10, 2026, system update 23.5.0 additionally lays the groundwork for a gifting function within the Nintendo eShop, slated to become active following eShop maintenance scheduled for November 17, 2026. Users will be enabled to dispatch suitable digital games, DLCs, expansions, and upgrade packs directly to members of their Nintendo Account family group, which can comprise up to eight accounts.
Senders can select a virtual gift-wrapping color and designate a recipient console if multiple devices connect to the recipient’s account, though supervised accounts belonging to younger children may receive gifts but cannot purchase or dispatch them. Official patch notes for version 23.5.0 also list accessibility options during the initial setup of the Switch 2, Portuguese language support for text-to-speech alongside GameChat conversions, and general bug fixes.
