CVE-2026-113949 in iOS
Summary
by MITRE • 10/26/2026
A type confusion issue was addressed with improved state management. 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 lead to memory corruption.
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Analysis
by VulDB Data Team • 10/26/2026
The vulnerability described involves a type confusion flaw within the Safari rendering engine or associated WebKit components on Apple platforms including iOS, iPadOS, macOS, and visionOS. Type confusion is a critical class of software defects where an application incorrectly handles data types during execution, leading to operations being performed on objects that are not of the expected type. In this specific instance, the issue stems from inadequate state management within the processing logic for web content. When the browser processes maliciously crafted HTML or JavaScript, it fails to properly validate or transition between internal states, causing a mismatch in how memory is allocated and accessed relative to the data types involved.
This technical flaw allows an attacker who controls the input stream of web content to manipulate the program's execution flow by exploiting the misidentified object type. Because the application assumes one data structure while operating on another, it can lead to out-of-bounds reads or writes in memory. Such memory corruption is particularly dangerous as it compromises the integrity and confidentiality of system resources. The impact extends beyond simple crashes; successful exploitation could potentially allow for arbitrary code execution with the privileges of the affected process. This represents a significant security risk because web browsers operate with high-level permissions to render content, making them prime targets for drive-by download attacks or remote code execution exploits delivered via compromised websites.
From an industry standards perspective, this vulnerability aligns closely with CWE-843, which defines access to incorrect type of variable or memory location. The exploitation technique likely leverages ATT&CK tactic T1203, specifically the sub-technique of exploiting vulnerabilities for client-side execution. By crafting specific web content that triggers the state management error during parsing or layout calculation phases, an attacker can bypass standard security mitigations such as heap randomization if the type confusion allows for precise memory control. The severity is heightened by the fact that Safari and WebKit are widely used across multiple Apple ecosystems, increasing the potential attack surface significantly.
Mitigation strategies primarily rely on applying the software updates provided in 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 address the root cause by improving state management logic to ensure that type checks are performed correctly before memory operations occur. Organizations should prioritize patching these systems immediately to close this attack vector. Additionally, users can reduce risk by enabling features like Content Security Policy where applicable, though client-side vulnerabilities in rendering engines often require strict vendor updates rather than configuration changes alone. Regular monitoring of security advisories and maintaining up-to-date operating system versions remain the most effective defense against such sophisticated web-based exploits.