CVE-2026-65412 Overview
CVE-2026-65412 is a null pointer dereference vulnerability [CWE-476] affecting multiple Apple operating systems. The flaw resides in web content processing logic and can be triggered when a user views maliciously crafted web content. Apple addressed the issue with improved input validation across its platform ecosystem.
Successful exploitation results in a denial-of-service condition on the affected device. The vulnerability requires user interaction but no authentication, and can be reached remotely through web content delivered by a browser or embedded web view.
Critical Impact
Remote attackers can crash web content processes on iPhone, iPad, Mac, Apple Watch, and Vision Pro devices by inducing users to load malicious web pages.
Affected Products
- Apple iOS and iPadOS (fixed in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27)
- Apple macOS (fixed in macOS Sequoia 15.8, macOS Tahoe 26.7, macOS Golden Gate 27)
- Apple visionOS 27 and watchOS 27
Discovery Timeline
- 2026-09-14 - CVE-2026-65412 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-65412
Vulnerability Analysis
The vulnerability is a null pointer dereference [CWE-476] in Apple's web content processing stack. When the affected code path handles specific web content, it dereferences a pointer without first confirming the pointer references a valid object. The result is an unhandled fault that terminates the responsible process.
Because the flaw is reachable through standard web navigation, any application embedding a web view on the affected platforms inherits the exposure. The impact is limited to availability, and Apple's advisory does not describe any path to memory disclosure or code execution from this specific defect.
Root Cause
The root cause is missing input validation prior to a pointer dereference within the web content pipeline. Apple's fix introduces additional validation on the affected input path so malformed or unexpected content is rejected before the dereference occurs. The full patch details are documented across Apple's advisories, including Apple Support Document #149034 and Apple Support Document #149042.
Attack Vector
An attacker delivers crafted web content over the network. The target user must load the content in a browser or an application that renders web content in an embedded view. When the vulnerable parser processes the payload, the affected component dereferences a null pointer and the process crashes, producing a denial-of-service condition on the user's device.
No public proof-of-concept exploit or CISA KEV listing has been reported for CVE-2026-65412 at the time of publication.
Detection Methods for CVE-2026-65412
Indicators of Compromise
- Repeated crashes of browser processes or web view helpers on Apple endpoints, particularly correlated with specific external URLs.
- macOS crash reports referencing web content rendering components with EXC_BAD_ACCESS (SIGSEGV) faults at a null address.
- Unexpected termination of applications that embed web views immediately after loading remote content.
Detection Strategies
- Collect and centralize crash telemetry from managed macOS, iOS, iPadOS, watchOS, and visionOS devices via MDM to identify repeated web content process failures.
- Correlate crash events with recently visited URLs to identify potentially malicious sites triggering the vulnerability.
- Track OS build versions in inventory to flag endpoints running versions prior to the fixed releases enumerated in Apple's advisories.
Monitoring Recommendations
- Monitor endpoint telemetry for anomalous process termination patterns in browsers and applications rendering web content.
- Alert on outbound connections to newly observed or low-reputation domains preceding browser crashes.
- Review MDM compliance reports for devices lagging on the required patch levels.
How to Mitigate CVE-2026-65412
Immediate Actions Required
- Deploy Apple's security updates to all managed endpoints: iOS 26.7 / iPadOS 26.7, iOS 27 / iPadOS 27, macOS Sequoia 15.8, macOS Tahoe 26.7, macOS Golden Gate 27, visionOS 27, and watchOS 27.
- Prioritize patching of devices used to browse untrusted web content or handle inbound links from external parties.
- Enable automatic updates in device management policies to reduce exposure windows on future advisories.
Patch Information
Apple has released fixes for all affected platforms. Administrators should reference the vendor advisories for build numbers and release notes: Apple Support Document #149034, Apple Support Document #149035, Apple Support Document #149037, Apple Support Document #149038, Apple Support Document #149041, Apple Support Document #149042, and Apple Support Document #149043.
Workarounds
- No vendor-supplied workaround exists. Patching is the only supported remediation.
- Restrict browsing to trusted sites and enforce web filtering at the network perimeter for unpatched devices during the update window.
- Advise users to avoid clicking untrusted links until the affected devices are updated.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.