Nintendo has officially moved to block a software security exploit on its latest console, dealing a significant blow to the system’s burgeoning modding scene.
According to a report by Jagat Play, Nintendo released firmware 23.5.0 on Monday which successfully patches the ns2jb jailbreak exploit developed by Sammy Hajhamid, also known as pepsipu.
The targeted jailbreak method utilized an exploit found in the application SmileBASIC 4 to execute user-created code outside of normal application functions.
This allowed users to run homebrew, back up save data, and modify games, with notable demonstrations including unofficial character modifications in Mario Kart World featuring figures like Hatsune Miku, Peter Griffin, and Cinnamoroll. The exploit was not a permanent modification, as users had to reactivate it after turning off or restarting the console.
Dataminer OatmealDome reported that the recent system software update closed the security loopholes on the operating system that previously allowed for game dumping and mod installation via software.
Despite the patch, the firmware does not entirely remove vulnerabilities tied to specific apps or games. Exploitation via SmileBASIC 4 and Civilization VII remains present, but users can no longer break out of the game’s restricted environment to access the broader Switch 2 operating system.
Beyond security patches, firmware 23.5.0 introduces several new features for users. Nintendo added accessibility settings to console configurations, support for an eShop gifting feature for family members scheduled to become active on November 17, 2026, and Portuguese language support for Text to Speech and GameChat features.
While this update helps Nintendo secure the Switch 2 ecosystem against the modification of exclusive games, the persistence of certain app-level vulnerabilities indicates that the competition between the company and modders over future game dumps and updates continues.
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