This document describes the security content of watchOS 26.4.
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 March 24, 2026
Available for: Apple Watch Series 6 and later
Impact: An attacker in a privileged network position may be able to intercept network traffic
Description: An authentication issue was addressed with improved state management.
CVE-2026-28865: Héloïse Gollier and Mathy Vanhoef (KU Leuven)
Available for: Apple Watch Series 6 and later
Impact: An app may be able to access sensitive user data
Description: An authorization issue was addressed with improved state management.
CVE-2026-28877: Rosyna Keller of Totally Not Malicious Software
Available for: Apple Watch Series 6 and later
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: A use-after-free issue was addressed with improved memory management.
CVE-2026-28879: Justin Cohen of Google
Available for: Apple Watch Series 6 and later
Impact: An attacker may be able to cause unexpected app termination
Description: A type confusion issue was addressed with improved memory handling.
CVE-2026-28822: Jex Amro
Available for: Apple Watch Series 6 and later
Impact: Processing an audio stream in a maliciously crafted media file may terminate the process
Description: An out-of-bounds access issue was addressed with improved bounds checking.
CVE-2026-20690: Hossein Lotfi (@hosselot) of TrendAI Zero Day Initiative
Entry updated May 11, 2026
Available for: Apple Watch Series 6 and later
Impact: A user in a privileged network position may be able to cause a denial-of-service
Description: A null pointer dereference was addressed with improved input validation.
CVE-2026-28886: Etienne Charron (Renault) and Victoria Martini (Renault)
Available for: Apple Watch Series 6 and later
Impact: An app may be able to enumerate a user's installed apps
Description: A privacy issue was addressed by removing sensitive data.
CVE-2026-28878: Zhongcheng Li from IES Red Team
Available for: Apple Watch Series 6 and later
Impact: An issue existed in curl which may result in unintentionally sending sensitive information via an incorrect connection
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-2025-14524
Available for: Apple Watch Series 6 and later
Impact: An app may be able to access sensitive user data
Description: An information leakage was addressed with additional validation.
CVE-2026-28870: XiguaSec
Available for: Apple Watch Series 6 and later
Impact: Processing a maliciously crafted file may lead to unexpected app termination
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-2025-64505
Available for: Apple Watch Series 6 and later
Impact: An app may be able to disclose kernel memory
Description: A logging issue was addressed with improved data redaction.
CVE-2026-28868: Gor Aleksanyan, Dhiyanesh Selvaraj (@redroot97), 이동하 (Lee Dong Ha of BoB 0xB6)
Entry updated May 11, 2026
Available for: Apple Watch Series 6 and later
Impact: An app may be able to leak sensitive kernel state
Description: This issue was addressed with improved authentication.
CVE-2026-28867: Jian Lee (@speedyfriend433)
Available for: Apple Watch Series 6 and later
Impact: An app may be able to cause unexpected system termination or corrupt kernel memory
Description: The issue was addressed with improved memory handling.
CVE-2026-20698: DARKNAVY (@DarkNavyOrg)
Available for: Apple Watch Series 6 and later
Impact: An app may be able to cause unexpected system termination or write kernel memory
Description: A use after free issue was addressed with improved memory management.
CVE-2026-20687: Johnny Franks (@zeroxjf)
Available for: Apple Watch Series 6 and later
Impact: An app may be able to enumerate a user's installed apps
Description: This issue was addressed with improved checks.
CVE-2026-28882: Ilya Andr (andrd3v), Ilias Morad (A2nkF) of Voynich Group, Duy Trần (@khanhduytran0), @hugeBlack
Entry updated May 11, 2026
Available for: Apple Watch Series 6 and later
Impact: An app may be able to fingerprint the user
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-28863: Gongyu Ma (@Mezone0)
Available for: Apple Watch Series 6 and later
Impact: A local attacker may gain access to user's Keychain items
Description: This issue was addressed with improved permissions checking.
CVE-2026-28864: Alex Radocea
Available for: Apple Watch Series 6 and later
Impact: A local attacker may be able to modify the state of the Keychain
Description: The issue was addressed with improved input validation.
CVE-2026-28860: Alex Radocea
Entry added May 11, 2026
Available for: Apple Watch Series 6 and later
Impact: An attacker with physical access to a locked device may be able to view sensitive user information
Description: The issue was addressed with improved authentication.
CVE-2026-28856: an anonymous researcher
Available for: Apple Watch Series 6 and later
Impact: An app may be able to cause a denial-of-service
Description: A stack overflow was addressed with improved input validation.
CVE-2026-28852: Caspian Tarafdar
Available for: Apple Watch Series 6 and later
Impact: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
Description: This issue was addressed through improved state management.
WebKit Bugzilla: 304951
CVE-2026-20665: webb
Available for: Apple Watch Series 6 and later
Impact: A malicious website may be able to process restricted web content outside the sandbox
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 308248
CVE-2026-28859: greenbynox, Arni Hardarson, and an anonymous researcher
Entry updated May 11, 2026
Available for: Apple Watch Series 6 and later
Impact: A maliciously crafted webpage may be able to fingerprint the user
Description: An authorization issue was addressed with improved state management.
WebKit Bugzilla: 306827
CVE-2026-20691: Gongyu Ma (@Mezone0)
We would like to acknowledge Yashar Shahinzadeh, Saman Ebrahimnezhad, Amir Safari, Omid Rezaii for their assistance.
We would like to acknowledge Hamid Mahmoud for their assistance.
We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy) for their assistance.
We would like to acknowledge Suresh Sundaram, Willard Jansen for their assistance.
We would like to acknowledge Peter Malone for their assistance.
We would like to acknowledge Salemdomain for their assistance.
We would like to acknowledge Jian Lee (@speedyfriend433) for their assistance.
We would like to acknowledge Jian Lee (@speedyfriend433) for their assistance.
We would like to acknowledge Adam Doupé of ASU SEFCOM, DARKNAVY (@DarkNavyOrg), Kylian Boulard De Pouqueville from Fuzzinglabs, Patrick Ventuzelo from Fuzzinglabs, Robert Tran, Suresh Sundaram, Tristan Madani (@TristanInSec) from Talence Security for their assistance.
Entry updated May 11, 2026
We would like to acknowledge Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs, Arni Hardarson for their assistance.
We would like to acknowledge Vitaly Simonovich (vitalysim.com) for their assistance.
Entry updated May 11, 2026
We would like to acknowledge Ilias Morad (@A2nkF_) for their assistance.
We would like to acknowledge Nathaniel Oh (@calysteon) for their assistance.
We would like to acknowledge JZ for their assistance.
We would like to acknowledge Gongyu Ma (@Mezone0) for their assistance.
We would like to acknowledge Dave G. for their assistance.
We would like to acknowledge Wojciech Regula of SecuRing (wojciechregula.blog), an anonymous researcher for their assistance.
We would like to acknowledge @RenwaX23, Farras Givari, Syarif Muhammad Sajjad, Yair for their assistance.
We would like to acknowledge Waleed Barakat (@WilDN00B) and Paul Montgomery (@nullevent) for their assistance.
We would like to acknowledge Anand Mallaya, Tech consultant, Anand Mallaya and Co., Harsh Kirdolia, Hrishikesh Parmar of Self-Employed for their assistance.
We would like to acknowledge Bilge Kaan Mızrak, Claude & Friends: Risk Analytics Research Group, Zack Tickman for their assistance.
We would like to acknowledge Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India for their assistance.
We would like to acknowledge AEC, Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India, Alex Thomas, Bishal Kafle (@whoisbishal.k), Carlos Luna (U.S. Department of the Navy), Dalibor Milanovic, Daren Goodchild, JS De Mattei, Maxwell Garn, Zack Tickman, fuyuu12, incredincomp for their assistance.
Entry updated May 11, 2026
We would like to acknowledge Zhongcheng Li from IES Red Team of ByteDance for their assistance.
We would like to acknowledge Carlos Jeurissen, Rob Wu (robwu.nl) for their assistance.
We would like to acknowledge Vamshi Paili for their assistance.
We would like to acknowledge Joseph Semaan for their assistance.
We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy), an anonymous researcher for their assistance.
We would like to acknowledge Alex Radocea of Supernetworks, Inc for their assistance.
We would like to acknowledge Marcel Voß, Mitul Pranjay, Serok Çelik for their assistance.