Fugu Jailbreak [All releases]

Fugu Jailbreak

Fugu jailbreak is an open source untethered jailbreak based on the checkm8 exploit. It was developed by security researcher Linus Henze from Koblenz, Germany.

Select Fugu Jailbreak according to your iOS versions.

Fugu15 Max for iOS 15 – iOS 15.4.1

Fugu15 Max Jailbreak for arm64e devices running iOS 15 – iOS 15.4.1. It is developed by trollstore developer, opa334 and now public beta available for download to developers.This is based on the earlier Fugu15 released by Linus Henze. However, the procedure is differ from the Fugu15. According to the developer , Fugu15 Max is the project name and final release will change the name. 

Compatible iOS versions : iOS 15, iOS 15.0.1, iOS 15.0.2, iOS 15.1, iOS 15.1.1, iOS 15.2, iOS 15.2.1, iOS 15.3, iOS 15.3.1, iOS 15.4, iOS 15.4.1

Compatible devices  : A12 – iPhone XS & iPhone XS Max, iPhone XR.

A13 – iPhone 11, iPhone 11 Pro & 11 Pro Max, iPhone SE (2nd gen).

A14 – iPhone 12 & 12 Mini, iPhone 12 Pro & 12 Pro Max.

A15 – iPhone 13 & 13 Mini, iPhone 13 Pro & 13 Pro Max, iPhone SE (3rd gen).

Download Fugu Max 15

Fugu15 Max Jailbreak IPA file can be installed using the TrollStore. However, Fugu15 MAX can not be recommended to the public. It should include the Support for Userspace reboot, A user interface and support for A14 chip-equipped devices to make it public.

Also, if trusted jailbreak tweak developers wish to update their tweaks to support it and the rootless dynamic, they can request a semi-private Fugu15 Max developer-only build, which is now available upon request. 
Now Fugu15 Max jailbreak name officially changed to Dopamine Jailbreak. Refer to Dopamine Jailbreak if you are interested.

Fugu15 for iOS 15 – iOS 15.4.1

Fugu15 perma-signed jailbreak app that supports certain arm64e devices running iOS 15 – iOS 15.4.1. It is a developer-focused jailbreak that means no tweak injection and has a new installation mechanism that made many of us think back to the JailbreakMe era. Fugu 15 semi-untethered jailbreak runs the Procursus bootstrap with the Sileo package manager

Compatible iOS versions – iOS 15, iOS 15.0.1, iOS 15.0.2, iOS 15.1, iOS 15.1.1, iOS 15.2, iOS 15.2.1, iOS 15.3, iOS 15.3.1, iOS 15.4, iOS 15.4.1

Compatible devices – arm64e devices 

Already tested on iPhone Xs Max, iPhone 11 (SRD), iPhone 12 (SRD), iPhone 12 Pro Max, iPhone 13

Download Fugu15

It’s important to note that Fugu15 can be installed via either a USB connection and Xcode on a Mac or Safari if you have a domain.

Install Fugu15 via Safari

Follow these instructions to install Fugu15 through Safari (you must own a domain):

Step 01 – Ensure that your computer and your gadget are both connected to the same network.

Step 02 – Modify the DNS a record linking a domain you own to your computer’s local IP address

Step 03 – Get a certificate for your domain (say, using Let’s Encrypt) and copy it to the files Server/serverCert/fullchain.cer and Server/serverCert/server.key (private key)

Step 04 – Make sure Flask is installed (pip3 install Flask)

Step 05 – Set your domain’s serverUrl in Server/server.py.

Step 06 – Open the Server directory, then run python3 server.py.

Step 07 – On your iPhone, go to your domain, and adhere to the directions.

Install Fugu15 TrollStore 

On iOS 15-compatible devices, the TIPA package Fugu15 can only be installed with TrollStore

Step 01 – Install TrollStore on iOS 15.4.1 or later firmware.

Step 02 – Save Fugu15.tipa to iCloud after downloading it.

Step 03 – Use the TrollStore app to share the downloaded IPA file.

Step 04 – When TrollStore is loaded, the Fugu15 software will immediately be installed.

 Step 05 – From the Home Screen, open the Fugu15 application.

Find more details about iOS 15 – iOS 15.4.1 from the following pages. 

iOS 15 – iOS 15.0.2 Jailbreak

iOS 15.1 / iOS 15.1.1 Jailbreak

iOS 15.2 / iOS 15.2.1 Jailbreak

iOS 15.3 / iOS 15.3.1 Jailbreak

iOS 15.4 / iOS 15.4.1 Jailbreak

Story of Fugu 15- Before the release, Fugu developer Linus Henze talks about  “The Journey to Jailbreaking iOS 15.4.1.” He demonstrated “how it is possible to jailbreak iOS 15.4.1” at the Mac Security Conference v5.0 held on Oct 6th-7th  in Spain, Europe.

Fugu14 for iOS 14.3 – iOS 14.5.1

Fugu 14 is an untethered jailbreak for iOS 14 – iOS 14.5.1.  Fugu14 combined with unc0ver Jailbreak as well.


iOS versions – iOS 14.5.1, iOS 14.5, iOS 14.4.2, iOS 14.4.1, iOS 14.4, iOS 14.3

Devices – iPhone XR, iPhone XS, iPhone XS Max, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE 2, iPhone 12 mini, iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max, iPad 8, iPad Air 2, iPad Air 3, iPad 9, iPad Air 4

Download Fugu14

Even though Fugu14 was released to the public, it is still on the developer level. You cannot use the Fugu14 easily. So you need to download and install the following tools to set up the Fugu 14.





iOS Firmware


Note – Fugu14 would be installed automatically when unc0ver jailbreak app side-loading via the AltStore v1.4.8

How to setup Fugu 14

Step 01 – Unzip downloaded fugu14 archive file.

Step 02 – Open it, go to arm > iOS > Fugu14App > Fugu14App.xcodeproj.

Step 03 – Tap on the “trust and open” from the prompt message. Now open the xcode project.

Step 04 – Meanwhile, connect the iPhone to the computer. Go to fugu14app > Targets> Signing & Capabilities > Team. If there is no Apple ID, tap on add an account then follow on-screen instructions.

Step 05 – If you get the error message, tap bundle Identifier and add some random text. It will fix the error. 

Step 06 – Close the Xcode window. Again go to the Fugu14-master folder. Find the ‘ios_install.py’ and run it. Type cd and drag the fugu 14 master folder into the terminal window to update the file path.

Step 07 – Tap Enter. It will get a ‘Welcome to the Fugu14 iOS installer’ message on the terminal window.

Step 08 – Check whether you have the requirements listed in the terminal window. Especially if you have an iproxy and iDevice installer, tap enter to continue.

Step 09 – It will ask some facts. Tap Y for “Do you want to build a jailbreak?”

Step 10 – Then it will ask “ What is the name of your iOS signing certificate?” Open altstore and go to your iPhone Settings > General>Device Management. Go to Apple ID, tap on it, you will see the iOS signing certificate name, type it on the terminal.

Step 11 – At the moment, it will be compiling the jailbreak & wait for the message **BUILD SUCCEEDED**

Step 12 – Rename the downloaded ipsw file extension to .zip. Then extract it. Find the largest dmg file from the extracted folder. Just double click to mount the file.

Step 13 – Again go to the terminal window. Type the part of the dmg file. You might get a “mount path not valid” error. If so, remove the slashes, then tap enter. It will show the created IPA.

Step 14 – Make sure the iPhone is connected to Mac. Now tap enter to continue and Fugu14 will start the sideloading process to your iPhone. Fugu14 will show an untrusted developer message. Go to Settings > General > Device Management. You can see Apple development there, tap to trust the app. Fugu14 will open.

Step 15 – Tap on the ‘Setup Fugu14’. Once completed the process through the iPhone,  go to the terminal window again. Tap enter.  It will display ‘Open the Fugu14App again following the on-screen instructions! message.

Step 16 – Reopen Fugu14 n from the iPhone. Go ahead according to the on-screen instructions.

Step 17 – Again go to the Terminal Window. Run the following commands via new terminal windows.

iproxy 1337 1337

Nc localhost 1337

Step 18 – Make sure to whether it works type bash on the terminal windows.

Well done! Now you have finished the Fugu setup.

Important  Facts of Fugu14
  • Fugu download online jailbreak support not available
  • Fugu does not support iOS 14.6 onwards. Get fugu alternatives.
  • MAC supported computer based jailbreak
  • Kernel exploit is extremely reliable
  • Fugu is still incomplete
  • Not supported for A9-A11 devices. (iPhone X and older) Use Fugu Alternative.

Unc0ver with Fugu14

The most important thing is when Fugu 14 released, Unc0ver v7.0.0 added support for iOS 14.4 – iOS 14.5.1 jailbreak on A12-A14 devices via Fugu14. It was developed by Pwn20wnd for iOS 11 – iOS 14.3 jailbreak. Unc0ver jailbreak is a semi-untethered jailbreak in its nature. But if you have a Fugu14 untether-compatible device, you can untether your unc0ver jailbreak using Fugu 14.

How to install the Fugu14 untether with the unc0ver jailbreak

With unc0ver v7.0.0 you have to set up fugu manually.

But now many bugs have been fixed via Unc0ver v7.0.1, v7.0.2. So, now you can install Fugu14 automatically when unc0ver jailbreak app side-loading via the AltStore v1.4.8.

When you install the Unc0ver via AltStore, it will pop up a message “ jailbreak requires untethering” to make it untether. However, you can select install without untethering if you don’t like.

Get the step by step guide from the Unc0ver Jailbreak page.

Fugu14 with Taurine Jailbreak

Taurine is a semi-untethered jailbreak tool for iOS 14 – iOS 14.3 by CoolStar. The developer hinted about a Taurine upgrade against the Fugu14 release via his discord channel.

However, now Taurine has upgraded up to iOS 14.4 onwards.

Find more details about Taurine from the Taurine jailbreak page.

Fugu Jailbreak for iOS 13 – iOS 13.5.1

Previously, Linus released fugu Jailbreak for iOS 13 – iOS 13.5.1. Fugu was the first open source jailbreak tool based on the checkm8 exploit two years ago. iPhone 7 is the only officially supported device for that time. That is also in developing mode and only meant to be used by developers.

Important Facts of Fugu (older version)

  • SSH and Substitute automatically install
  • Install Sileo automatically
  • MacOS Application that exploits your iDevice using checkm8 and uploads iStrap, iStrap loader and iDownload
  • It’s need to put your iDevice into DFU mode, run Fugu iStrap, unlock your iDevice and follow the on-screen instructions. Download and install from here.
  • All devices with the A10/A10X CPU should be supported

However, at that time it was not popular because there were a lot of jailbreaks available for these versions. Find iOS 13 – iOS 13.5.1 Jailbreak from here.

Fugu not supported versions ( iOS 14.6 – iOS 14.8.1, iOS 15.5 – iOS 15.8.2 & iOS 16 – iOS 16.7.8 and iOS 17 – iOS 17.6, iOS 18 beta)

No hint about Fugu for iOS 14.6 – iOS 14.8.1, iOS 15.5 – iOS 15.8.2, iOS 16 – iOS 16.7.8, iOS 17 – iOS 17.6 or iOS 18 beta versions. There is a Palera1n jailbreak for iOS 15 – iOS 16.4.1, iPadOS 17-17.3.1 and Checkra1n jailbreak tool available for iOS 14.6 – iOS 14.8.1. Read about Fugu Alternative. Also, unc0ver jailbreak supports iOS 14.6 – iOS 14.8 only for A12/A13 devices.

Find  more details relevant to iOS versions  from iOS 14.8 / iOS 14.8.1 Jailbreak, iOS 15.7 – iOS 15.7.9 Jailbreak, iOS 15.8-iOS 15.8.2 Jailbreak, iOS 16.7-iOS 16.7.8 Jailbreak, iOS 17 – iOS 17.0.3 JailbreakiOS 17.1- iOS 17.1.2 Jailbreak, iOS 17.2/iOS 17.2.1 Jailbreak, iOS 17.3/iOS 17.3.1 Jailbreak, iOS 17.4/iOS 17.4.1 Jailbreak, iOS 17.5/iOS 17.5.1 Jailbreak, iOS 17.6 Jailbreak (beta) and iOS 18 Jailbreak (beta) pages.

Fugu Alternatives

Zeon – Zeon is a jailbreak repo extractor. You can install Jailbreak apps using zeon on iOS 14 – iOS 17.6 including iOS 18 beta running all device models including the latest iPhone 15 and iPhone 14. It is an online process and you can easily install it on your device. You can use it as a Fugu alternative.

Palera1n – Palera1n is Checkm8 jailbreak for iOS 15 – iOS 15.8.2, iOS 16 – iOS 16.4.1, iPadOS 17 -17.3.1 is also supported. This works with all A9-A11 devices. Linux or macOS, Python 3 is required for this jailbreak.

Checkra1n Jailbreak – Fugu does not work with iPhone X and older devices. So, you can use Checkra1n as an alternative for these devices running iOS 14 – iOS 14.8.1 jailbreak. Checkra1n also based on the Checkm8 exploit. It is a computer based semi-tethered jailbreak.