CVE-2026-112699 in iOS
Summary
by MITRE • 10/26/2026
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Safari 27.2, iOS 26.7.2 and iPadOS 26.7.2, iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, visionOS 27.2. Processing maliciously crafted web content may result in the disclosure of process memory.
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Analysis
by VulDB Data Team • 10/27/2026
The vulnerability described constitutes a classic out-of-bounds read condition within the Safari rendering engine and associated WebKit components across multiple Apple operating systems including iOS, iPadOS, macOS, and visionOS. This type of flaw typically arises when software reads data from a buffer using an index or pointer that exceeds the allocated boundaries of that buffer. In the context of web browsers, this often occurs during the parsing or rendering of complex HTML, CSS, JavaScript, or multimedia content where memory management logic fails to validate array indices or string lengths against their actual allocated sizes before accessing them. The root cause is fundamentally a failure in input validation and bounds checking mechanisms within the code responsible for processing maliciously crafted web content.
From a technical perspective, an out-of-bounds read allows an attacker who controls the execution context of the browser to access memory locations that were not intended to be accessible by the current process. While this vulnerability does not directly allow for arbitrary code execution or write operations which would lead to remote code execution, it facilitates information disclosure. By carefully crafting web content that triggers this specific memory access pattern, an attacker can cause the browser to leak sensitive data from adjacent memory regions into the rendered output or JavaScript variables. This leaked data may include internal pointers, stack contents, heap metadata, or other process-specific information that could be leveraged in subsequent stages of a multi-stage attack chain.
The operational impact of this vulnerability is primarily centered on confidentiality rather than integrity or availability. The disclosure of process memory can provide attackers with valuable intelligence about the target environment. For instance, leaked pointers might reveal base addresses used for Address Space Layout Randomization (ASLR), thereby weakening one of the primary defenses against exploitation. Additionally, access to heap metadata could aid in constructing more reliable exploits by allowing an attacker to map out the layout of memory allocations. Although the immediate risk is limited to information disclosure, such leaks significantly lower the barrier for further exploitation and can lead to full system compromise when combined with other vulnerabilities or techniques.
This vulnerability aligns closely with Common Weakness Enumeration (CWE) category CWE-125, which defines out-of-bounds read errors where software reads past the end of a buffer. In terms of adversary tactics, this behavior corresponds to ATT&CK technique T1083, File and Directory Discovery, or more specifically in browser contexts, it relates to memory scraping techniques often categorized under data exfiltration methods like T1567.2, Exfil Over Alternative Protocol if the leaked data is transmitted externally, though primarily it serves as a reconnaissance step within the exploitation lifecycle. The fix implemented involves rigorous improvements to bounds checking logic, ensuring that all array accesses and buffer reads are validated against their defined limits before execution proceeds.
To mitigate the risks associated with this vulnerability, users must ensure they have applied the latest security updates for Safari 27.2, iOS 26.7.2, iPadOS 26.7.2, iOS 27.2, iPadOS 27.2, macOS Golden Gate 27.2, and visionOS 27.2. These patches contain the necessary code changes to enforce strict boundary checks during web content processing. Organizations should prioritize patching these endpoints as soon as possible given that mobile devices are frequently targeted via phishing campaigns containing malicious links designed to trigger such rendering engine flaws. Furthermore, enabling automatic updates where available can help maintain a consistent security posture against emerging browser-based threats. Security teams should also monitor for indicators of compromise related to memory scraping activities and ensure that web content filtering solutions are updated to detect attempts to exploit known WebKit vulnerabilities.