CVE-2026-64719 in iOS
Summary
by MITRE • 07/28/2026
An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a classic out-of-bounds memory access flaw that was remediated through enhanced bounds checking mechanisms within Apple's web rendering engine. The issue specifically affected Safari and related operating systems including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS versions 26.6. The technical nature of this vulnerability falls under the common weakness enumeration CWE-129 which encompasses improper validation of array indices or other bounds checking mechanisms. When processing maliciously crafted web content, the affected systems would experience unexpected crashes due to attempts to access memory locations beyond the allocated buffer boundaries.
The operational impact of this vulnerability extends beyond simple application instability, as it could potentially be exploited by attackers to deliver denial-of-service attacks or serve as a precursor for more sophisticated exploitation techniques. The bounds checking improvements implemented in the patched versions demonstrate Apple's proactive approach to addressing memory safety issues within their web browser and operating system components. According to ATT&CK framework category T1499, this vulnerability could be leveraged as part of broader attack chains targeting system stability and availability.
The fix implemented by Apple involved strengthening the validation mechanisms that control access to memory buffers during web content rendering processes. This type of vulnerability typically arises when web browsers fail to properly validate input data from malicious websites before processing it through internal rendering engines. The affected components likely include the WebKit rendering engine's JavaScript execution environment and HTML/CSS parsing modules where improper bounds checking allowed attackers to manipulate memory access patterns. The patch addresses this by implementing more rigorous validation of array indices, string lengths, and buffer boundaries during web page processing.
Organizations should prioritize updating all affected systems to version 26.6 across all supported platforms to eliminate exposure to this vulnerability. Security teams should monitor for any potential exploitation attempts targeting this specific memory access flaw, as it represents a known entry point that could be combined with other vulnerabilities in advanced attack scenarios. The remediation process requires careful consideration of compatibility testing to ensure that legitimate web content continues to render properly while the security enhancements are fully implemented across all affected operating system versions and device types.