This document describes the security content of watchOS 26.3.
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security releases page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
Released February 11, 2026
Available for: Apple Watch Series 6 and later
Impact: An attacker in a privileged network position may be able to perform denial-of-service attack using crafted Bluetooth packets
Description: A denial-of-service issue was addressed with improved validation.
CVE-2026-20650: jioundai
Available for: Apple Watch Series 6 and later
Impact: Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds access issue was addressed with improved bounds checking.
CVE-2026-20611: Anonymous working with Trend Micro Zero Day Initiative
Available for: Apple Watch Series 6 and later
Impact: Processing a maliciously crafted file may lead to a denial-of-service or potentially disclose memory contents
Description: The issue was addressed with improved memory handling.
CVE-2026-20609: Yiğit Can YILMAZ (@yilmazcanyigit)
Available for: Apple Watch Series 6 and later
Impact: An app may be able to gain root privileges
Description: A race condition was addressed with improved state handling.
CVE-2026-20617: Gergely Kalman (@gergely_kalman), Csaba Fitzl (@theevilbit) of Iru
Available for: Apple Watch Series 6 and later
Impact: An app may be able to access sensitive user data
Description: An issue existed in the handling of environment variables. This issue was addressed with improved validation.
CVE-2026-20627: an anonymous researcher
Available for: Apple Watch Series 6 and later
Impact: An attacker with memory write capability may be able to execute arbitrary code. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 and CVE-2025-43529 were also issued in response to this report.
Description: A memory corruption issue was addressed with improved state management.
CVE-2026-20700: Google Threat Analysis Group
Available for: Apple Watch Series 6 and later
Impact: A user may be able to view sensitive user information
Description: A logging issue was addressed with improved data redaction.
CVE-2026-20649: Asaf Cohen
Available for: Apple Watch Series 6 and later
Impact: Processing a maliciously crafted image may lead to disclosure of user information
Description: The issue was addressed with improved bounds checks.
CVE-2026-20675: George Karchemsky (@gkarchemsky) working with Trend Micro Zero Day Initiative
Available for: Apple Watch Series 6 and later
Impact: Processing a maliciously crafted image may result in disclosure of process memory
Description: The issue was addressed with improved memory handling.
CVE-2026-20634: George Karchemsky (@gkarchemsky) working with Trend Micro Zero Day Initiative
Available for: Apple Watch Series 6 and later
Impact: An app may be able to cause unexpected system termination
Description: The issue was addressed with improved memory handling.
CVE-2026-20654: Jian Lee (@speedyfriend433)
Available for: Apple Watch Series 6 and later
Impact: An attacker in a privileged network position may be able to intercept network traffic
Description: A logic issue was addressed with improved checks.
CVE-2026-20671: Xin'an Zhou, Juefei Pu, Zhutian Liu, Zhiyun Qian, Zhaowei Tan, Srikanth V. Krishnamurthy, Mathy Vanhoef
Available for: Apple Watch Series 6 and later
Impact: Processing a maliciously crafted file may lead to a denial-of-service
Description: This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org.
CVE-2025-59375
Available for: Apple Watch Series 6 and later
Impact: An app may be able to break out of its sandbox
Description: A logic issue was addressed with improved checks.
CVE-2026-20667: an anonymous researcher
Available for: Apple Watch Series 6 and later
Impact: An app may be able to break out of its sandbox
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-20628: Noah Gregory (wts.dev)
Available for: Apple Watch Series 6 and later
Impact: An app may be able to identify what other apps a user has installed
Description: A privacy issue was addressed with improved checks.
CVE-2026-20641: Gongyu Ma (@Mezone0)
Available for: Apple Watch Series 6 and later
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 304661
CVE-2026-20635: EntryHi
We would like to acknowledge Tommaso Sacchetti for their assistance.
We would like to acknowledge Joseph Ravichandran (@0xjprx) of MIT CSAIL, Xinru Chi of Pangu Lab for their assistance.
We would like to acknowledge Fabiano Anemone for their assistance.
We would like to acknowledge Gongyu Ma (@Mezone0) for their assistance.
We would like to acknowledge Wojciech Regula of SecuRing (wojciechregula.blog) for their assistance.
We would like to acknowledge Lorenzo Santina (@BigNerd95) and Marco Bartoli (@wsxarcher) for their assistance.
We would like to acknowledge EntryHi, Luigino Camastra of Aisle Research, Stanislav Fort of Aisle Research, Vsevolod Kokorin (Slonser) of Solidlab and Jorian Woltjer for their assistance.