iOS 27.0.1 Untethered Jailbreak Demonstrated at Hexacon
Calif researchers showed the jailbreak live on stage at Hexacon 2026, an offensive security conference in Paris. In the demo, the iPhone 18 Pro was rebooted, unlocked with its normal passcode, and still gave a root SSH shell. No computer was attached. That makes it untethered, which no public jailbreak for modern iPhones has been in years.
- •Researchers: Calif (calif.io)
- •Device: iPhone 18 Pro
- •Firmware: iOS 27.0.1, the latest public version at the time of the demo
- •Type: Untethered root jailbreak (survives reboot)
- •Release: Not public. Calif says it will publish "in due time", with no date.
- •AI involvement: Reports say AI helped find the exploit chain. Calif has used Anthropic's Claude in earlier research, but has not said how much AI was used here.
Current iOS 27 Jailbreak Status
Apple released iOS 27 to the public in September 2026. The latest version is iOS 27.0.1.
| Status Item | Details |
|---|---|
| Latest Public Version | iOS 27.0.1 |
| Root Jailbreak (Demonstrated) | Yes: untethered, iOS 27.0.1, iPhone 18 Pro (Calif, Hexacon, Oct 16, 2026) |
| Public Tool / Download | Not released. No date announced. |
| Vulnerabilities Disclosed | No. Calif has not named the bugs used. |
| Apple Response | No public comment yet |
| Customization Tools (Misaka26 / Nugget) | Not compatible with iOS 27 |
| Recommended Action | Stay on iOS 27.0.1 or lower if you want this jailbreak. Avoid iOS 27.1+. |
iOS 27 Jailbreak Timeline
- June 2026iOS 27 Developer Beta 1 released at WWDC. No jailbreak research published.
- Sep 2026iOS 27 public release. Apple's security notes credit Calif (with Claude and Anthropic Research) for two crash bugs, which are not linked to the jailbreak.
- After launchiOS 27.0.1 released. This is the latest public version.
- Oct 16, 2026Calif demonstrates an untethered root jailbreak on an iPhone 18 Pro running iOS 27.0.1 at Hexacon, Paris.
- TBACalif publishes details and possibly a tool. No date given.
When Will the iOS 27 Jailbreak Be Released?
There is no date. Researchers who demo at conferences usually report the bugs to Apple first and publish once a patch ships. If that happens here:
- •A future iOS update (likely 27.1 or 27.0.2) will probably patch it. Devices that update will lose the chance to use it.
- •The write-up may come before a ready-to-use tool. Tools like Dopamine would still need to be adapted for iOS 27, which can take weeks or months.
- •Other demos may follow. Calif's newsletter lists four demos, including Signal and iMessage exploits, all to be released later.
Should You Update Past iOS 27.0.1?
If you want to jailbreak, no. Stay on iOS 27.0.1 or lower.
Turn off Automatic Updates (Settings → General → Software Update → Automatic Updates) and do not install iOS 27.1 or later until affected versions are confirmed. Apple stops signing older versions soon after an update, so you cannot go back once you update.
On iOS 26.0 to 26.1? Misaka26 and Nugget still work there. Updating to iOS 27 removes that option.
iOS 27 Jailbreak Tools: Compatibility
Only follow official channels for release news. Tools appear on GitHub and r/jailbreak first.
| Tool | iOS 27 Status | Official Channel |
|---|---|---|
| Calif (research) | Demonstrated on 27.0.1, not released | calif.io |
| Dopamine | No iOS 27 support announced | GitHub |
| Palera1n | Not available (checkm8 devices only) | GitHub |
| Misaka26 | Not compatible | GitHub |
| Nugget | Not compatible | GitHub |
| AltStore PAL / SideStore | Sideloading works (not a jailbreak) | altstore.io |
iOS 27 Jailbreak Scams to Avoid
Fake sites always appear after a big demo like this. There is no real iOS 27 jailbreak download right now. Avoid anything offering:
- An "iOS 27.0.1 untethered jailbreak" download or IPA
- Paid or "verification required" installers
- Profiles (.mobileconfig) that claim to jailbreak your iPhone
- "Early access" to the Calif exploit
Real jailbreaks are free, open-source, and published on the developer's official GitHub or website.
iOS 27 Jailbreak Device Compatibility
Only the iPhone 18 Pro has been shown. Other devices are unconfirmed until the details are published.
| Device | Chipset | Jailbreak Status |
|---|---|---|
| iPhone 18 Pro | Latest A-series Pro | Demonstrated on iOS 27.0.1 |
| iPhone 18 Pro Max | Latest A-series Pro | Likely affected, not confirmed |
| iPhone 17 Pro / Pro Max | A19 Pro | Not confirmed |
| iPhone 17 / 17e | A19 | Not confirmed |
| iPhone 16 Pro / Pro Max | A18 Pro | Not confirmed |
| iPhone 16 / 16 Plus / 16e | A18 | Not confirmed |
| iPhone 15 Pro / Pro Max | A17 Pro | Not confirmed |
| iPhone 15 / 15 Plus | A16 | Not confirmed |
Sources
Frequently Asked Questions
Is there an iOS 27 jailbreak?
A working one has been shown, but you cannot download it. On October 16, 2026, security firm Calif demonstrated an untethered jailbreak on an iPhone 18 Pro running iOS 27.0.1 at the Hexacon conference in Paris. Calif has not released a tool, named the bugs, or given a release date.
Is the iOS 27.0.1 untethered jailbreak released?
No. Posts calling it a release are overstating it. What happened was a live stage demo. Calif says the research will be published "in due time", with no date. Any site offering an iOS 27 jailbreak download today is a scam.
What does untethered mean?
An untethered jailbreak stays active after a reboot without needing a computer. In the Hexacon demo the iPhone 18 Pro was rebooted, unlocked with its passcode, and still gave a root SSH session. No public untethered jailbreak has existed for modern iPhones in years.
Should I update past iOS 27.0.1?
If you want a chance at using this jailbreak, stay on iOS 27.0.1 or lower and do not install iOS 27.1 or newer until it is clear which versions are affected. Apple usually patches demonstrated bugs once it knows the details. If security matters more to you than jailbreaking, update normally.
Which devices does the iOS 27 jailbreak support?
Only the iPhone 18 Pro on iOS 27.0.1 has been shown publicly. Support for older iPhones such as the iPhone 17, 16 and 15 series has not been confirmed. Device support will only be known when Calif publishes its work or a tool is built on it.
iOS 27 Versions
- iOS 27.0.1 - Latest. Untethered jailbreak demonstrated (not released).
- iOS 27.0 - Released September 2026. Presumed affected, not confirmed.