Security Research: Lockdown Mode Bypass and Persistence on iOS 27

The security research team Calif has reported a successful jailbreak demonstration on an iPhone 18 Pro running in Lockdown Mode.

Key Technical Observations:

• Persistence: The jailbreak state remains active after updating the device to iOS 27.2.
• Vector: The exploit is initiated via a malicious PDF file delivered through AirDrop.
• Lockdown Mode: The vulnerability bypasses the "extreme protection" features of Lockdown Mode, which typically restricts message attachments and limits web technologies to mitigate mercenary spyware.

The researchers have confirmed they are disclosing these findings to Apple through responsible disclosure channels and do not intend to release a public jailbreak tool.

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Source: https://www.macrumors.com/2026/11/03/iphone-jailbreak-lockdown-mode/