Update and context
Nintendo appears to have closed a recently reported software-only jailbreak for the Nintendo Switch 2 after the removal of SmileBASIC 4 from the Nintendo eShop and a subsequent firmware update.
The exploit, dubbed "ns2jb" by its creator, reportedly leveraged the Switch 2 title SmileBASIC 4 running on firmware 23.0.1 to execute arbitrary native code and enable homebrew, modding, and save backups.
What was reported
On October 23, 2026, security researcher and modder Sammy "pepsipu" Hajhamid published details of ns2jb, describing it as a tethered, software-only jailbreak.
According to the creator, the exploit allowed native code execution, peripheral access via MMIO, and the ability to inspect and modify Switch 2 titles.
Hajhamid also said the project was developed with assistance from OpenAI's Codex, and demonstrated the exploit by adding third-party characters to the Switch 2 exclusive Mario Kart World.
Rewritten statements
Hajhamid summarized the exploit's capabilities by saying that ns2jb permitted homebrew execution, game reverse-engineering and modding, save file extraction, and access to many Switch 2 peripherals through memory-mapped I/O.
He noted this was, to his knowledge, the first such software-only exploit for the platform and used a high-profile game to showcase what the jailbreak could do.
Subsequent actions and patch
Following the public reporting, SmileBASIC 4 was removed from the Nintendo eShop.
Nintendo has not publicly commented on the removal or the exploit.
On November 10, 2026, modder OatmealDome posted on social media that firmware update 23.5.0 for the Switch 2 appears to have patched the jailbreak.
In practical terms, that means dumping and modding games via this route should no longer be possible except for certain cartridge-based titles or very recently released updates.
Technical and historical notes
Ns2jb was described as a tethered, software-only exploit, meaning that the jailbreak state did not persist after powering the console off.
SmileBASIC has a history as a vehicle for homebrew on Nintendo platforms, having been used for similar exploits during the Nintendo 3DS generation.
Implications
With the eShop delisting and firmware 23.5.0 in the wild, the window for using this particular Switch 2 vector is effectively closed for most users.
Developers, security researchers, and the modding community will likely review the technical details that were shared, but as of the latest reports, Nintendo’s firmware has mitigated the immediate risk that ns2jb represented.
Nintendo appears to have closed a recently reported software-only jailbreak for the Nintendo Switch 2 after the removal of SmileBASIC 4 from the Nintendo eShop and a subsequent firmware update.
The exploit, dubbed "ns2jb" by its creator, reportedly leveraged the Switch 2 title SmileBASIC 4 running on firmware 23.0.1 to execute arbitrary native code and enable homebrew, modding, and save backups.
What was reported
On October 23, 2026, security researcher and modder Sammy "pepsipu" Hajhamid published details of ns2jb, describing it as a tethered, software-only jailbreak.
According to the creator, the exploit allowed native code execution, peripheral access via MMIO, and the ability to inspect and modify Switch 2 titles.
Hajhamid also said the project was developed with assistance from OpenAI's Codex, and demonstrated the exploit by adding third-party characters to the Switch 2 exclusive Mario Kart World.
Rewritten statements
Hajhamid summarized the exploit's capabilities by saying that ns2jb permitted homebrew execution, game reverse-engineering and modding, save file extraction, and access to many Switch 2 peripherals through memory-mapped I/O.
He noted this was, to his knowledge, the first such software-only exploit for the platform and used a high-profile game to showcase what the jailbreak could do.
Subsequent actions and patch
Following the public reporting, SmileBASIC 4 was removed from the Nintendo eShop.
Nintendo has not publicly commented on the removal or the exploit.
On November 10, 2026, modder OatmealDome posted on social media that firmware update 23.5.0 for the Switch 2 appears to have patched the jailbreak.
In practical terms, that means dumping and modding games via this route should no longer be possible except for certain cartridge-based titles or very recently released updates.
Technical and historical notes
Ns2jb was described as a tethered, software-only exploit, meaning that the jailbreak state did not persist after powering the console off.
SmileBASIC has a history as a vehicle for homebrew on Nintendo platforms, having been used for similar exploits during the Nintendo 3DS generation.
Implications
With the eShop delisting and firmware 23.5.0 in the wild, the window for using this particular Switch 2 vector is effectively closed for most users.
Developers, security researchers, and the modding community will likely review the technical details that were shared, but as of the latest reports, Nintendo’s firmware has mitigated the immediate risk that ns2jb represented.
