u/SwarupSaha

Hi everyone,

I’ve recently updated my iPhone to iOS 26.4.2. I now need to perform an iOS application security assessment (pentesting), and for that, I require a jailbroken device.

I have a few questions:

• Is jailbreak possible on iOS 26.4.2?
• If not, do I need to downgrade?
• Is downgrading currently possible (based on signed IPSW)?
• Which iOS version should I target for a stable jailbreak suitable for security testing?

Important note:
I need iOS 16.6 or above because TestFlight is not supporting lower versions in my case. So ideally, I’m looking for a jailbreak-compatible version ≥16.6.

Additionally, if anyone can guide:

• What’s the current recommended approach/tools for jailbreaking (for research/security testing)?
• Any best practices for setting up a proper iOS pentesting environment?

Thanks in advance for your help!