CVE-2026-65332 Overview
CVE-2026-65332 is a state management vulnerability in Apple Safari and related operating systems. Processing maliciously crafted web content can trigger an unexpected Safari crash, resulting in a denial-of-service condition on the affected browser process. Apple addressed the issue through improved state management across Safari, iOS, iPadOS, and macOS. The flaw maps to [CWE-703] Improper Check or Handling of Exceptional Conditions. Exploitation requires user interaction, such as visiting an attacker-controlled webpage, and does not affect confidentiality or integrity.
Critical Impact
A remote attacker can crash Safari by luring a user to malicious web content, disrupting browsing sessions on iOS, iPadOS, and macOS devices.
Affected Products
- Apple Safari (fixed in Safari 26.6.1)
- Apple iOS and iPadOS (fixed in 18.7.10 and 26.6.1)
- Apple macOS Tahoe (fixed in 26.6.2)
Discovery Timeline
- 2026-08-17 - CVE-2026-65332 published to the National Vulnerability Database (NVD)
- 2026-08-19 - Last updated in NVD database
Technical Details for CVE-2026-65332
Vulnerability Analysis
The vulnerability resides in the web content processing path used by Safari and the underlying WebKit engine on iOS, iPadOS, and macOS. When Safari parses specifically crafted web content, the browser fails to correctly manage internal state transitions. This mishandling produces an exceptional condition that terminates the Safari process unexpectedly. The result is a denial-of-service impact against the client browser rather than code execution or data disclosure.
Apple's advisories describe the fix as improved state management, indicating that logic paths related to object or session state were previously reachable in an inconsistent form. Attackers targeting this class of flaw typically host malicious HTML, JavaScript, or media payloads that push the renderer into the vulnerable state.
Root Cause
The root cause is improper handling of an exceptional condition [CWE-703] during web content processing. Safari does not adequately validate or guard specific state transitions, allowing malformed input to reach code paths that assume valid state. When these assumptions fail, the browser crashes instead of recovering gracefully.
Attack Vector
Exploitation occurs over the network and requires user interaction. A victim must load attacker-controlled web content, typically by visiting a malicious URL, opening a crafted link, or rendering embedded content in an application that uses WebKit. No authentication or elevated privileges are required. The scope remains unchanged, and only availability of the Safari process is affected. Public proof-of-concept exploits are not currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
See the Apple Support Article 148281, Apple Support Article 148282, Apple Support Article 148286, and Apple Support Article 148287 for vendor technical details.
Detection Methods for CVE-2026-65332
Indicators of Compromise
- Repeated, unexpected termination of the Safari process on iOS, iPadOS, or macOS endpoints following web browsing activity.
- Crash reports referencing WebKit or Safari state handling generated in ~/Library/Logs/DiagnosticReports/ on macOS.
- User reports of Safari tabs closing or the browser quitting when visiting specific pages.
Detection Strategies
- Monitor endpoint telemetry for abnormal frequency of Safari and com.apple.WebKit.WebContent process crashes.
- Correlate browser crash events with recently visited URLs to identify potentially malicious origins.
- Track Safari and OS build versions across the fleet to identify hosts still running vulnerable versions.
Monitoring Recommendations
- Ingest macOS unified logs and iOS device management telemetry into a central analytics platform to baseline Safari stability.
- Alert on repeated WebKit content process terminations from the same URL or domain across multiple users.
- Review web proxy and DNS logs for connections to newly registered or low-reputation domains preceding crash events.
How to Mitigate CVE-2026-65332
Immediate Actions Required
- Update Safari to version 26.6.1 on supported macOS releases.
- Upgrade iOS and iPadOS devices to 18.7.10 or 26.6.1, depending on the major version in use.
- Upgrade macOS Tahoe systems to 26.6.2.
- Prioritize patching for users who routinely browse untrusted external content.
Patch Information
Apple has released fixes for CVE-2026-65332 in Safari 26.6.1, iOS 18.7.10, iPadOS 18.7.10, iOS 26.6.1, iPadOS 26.6.1, and macOS Tahoe 26.6.2. Deployment details are documented in Apple Support Article 148281, Apple Support Article 148282, Apple Support Article 148286, and Apple Support Article 148287.
Workarounds
- Restrict browsing to trusted sites until all managed devices receive the vendor patches.
- Use enterprise mobility management (MDM) policies to enforce minimum Safari and OS versions.
- Advise users to avoid opening untrusted links in messaging apps and email while patches are pending.
# Verify installed Safari version on macOS
defaults read /Applications/Safari.app/Contents/Info.plist CFBundleShortVersionString
# Check current macOS version
sw_vers -productVersion
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
