Description

Security researchers have demonstrated an untethered jailbreak on an iPhone 18 Pro running iOS 27.0.1, raising concerns about the resilience of Apple’s latest mobile security protections. The demonstration, presented at the Hexacon 2026 security conference in Paris on October 16, showed that the jailbreak could survive a complete device reboot without requiring a computer connection. Researchers obtained root-level access, indicating that the device’s operating system protections could be bypassed. However, the specific vulnerabilities used in the demonstration have not been publicly disclosed. The attack reportedly involved bypassing several layers of iOS security, including application sandboxing, kernel protections, and hardware-backed Pointer Authentication Codes (PAC). These mechanisms normally restrict unauthorized code execution and privilege escalation. The demonstrated jailbreak restored root access after reboot and enabled Secure Shell (SSH) connectivity on port 2222, allowing researchers to interact with the device with elevated privileges. The researchers have not released the exploit code or identified the specific vulnerabilities and CVE IDs used in the jailbreak chain. Apple’s iOS 27 and iPadOS 27 security documentation lists numerous patched vulnerabilities, including CVE-2026-84607, a race-condition flaw in AVEVideoEncoder that could allow a sandboxed application to execute arbitrary code with kernel privileges; CVE-2026-43689, a kernel permissions vulnerability that could allow a malicious application to gain root privileges; and CVE-2026-65414, a Bluetooth out-of-bounds write vulnerability potentially enabling unexpected application termination or arbitrary code execution. However, there is no public confirmation that these vulnerabilities were used in the demonstrated jailbreak. Organizations and users should install the latest security updates available for their Apple devices, avoid jailbreaking production devices, and install applications only from trusted sources. Enterprise administrators should enforce device compliance policies, monitor for unauthorized configuration changes, and restrict access to sensitive corporate resources from jailbroken devices. Users should also maintain encrypted backups and report unusual device behavior to their security teams. These precautions can reduce exposure while further technical details about the jailbreak remain undisclosed.