CVE-2026-113320 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Navigation in Google Chrome on on iOS prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/22/2026
The vulnerability identified involves a memory corruption flaw within the navigation subsystem of Google Chrome for iOS, specifically affecting versions prior to 156.0.8078.47. This defect resides in the core components responsible for handling web page transitions and resource loading sequences. The issue is classified as having medium severity by Chromium security standards, indicating a significant risk that warrants immediate attention but may not inherently lead to full system compromise without additional exploitation steps. Memory corruption vulnerabilities of this nature typically arise from improper handling of memory allocation or deallocation processes during the complex state changes associated with navigating between web pages.
The technical root cause centers on how Chrome manages internal data structures when processing crafted HTML content. When a user visits a maliciously constructed webpage, specific sequences of DOM manipulation and navigation events can trigger an out-of-bounds write or use-after-free condition within the browser's memory space. This allows an attacker to corrupt critical pointers or overwrite adjacent memory regions with controlled values. Because modern browsers operate in a sandboxed environment designed to isolate web content from the underlying operating system, this corruption occurs primarily within the restricted context of the renderer process rather than immediately granting access to the host device's kernel or file system.
The operational impact of this vulnerability is substantial due to its remote exploitability vector. An attacker does not need physical access to the target device nor any prior authentication credentials. Instead, they can distribute a malicious HTML page through various channels such as phishing emails, compromised websites, or drive-by download scenarios. If successful, the memory corruption could allow for arbitrary code execution within the browser's sandboxed environment. While the sandbox provides a critical layer of defense, sophisticated attackers often combine this initial foothold with other techniques to escape the sandbox and achieve higher privilege levels on the iOS device. This potential escalation path makes the vulnerability particularly dangerous in enterprise or high-security contexts where data confidentiality is paramount.
Mitigation strategies primarily involve updating the browser software to version 156.0.8078.47 or later, which contains patches addressing these specific memory management errors. Users should ensure automatic updates are enabled for Google Chrome on iOS to receive security fixes promptly. Additionally, employing mobile device management solutions that enforce application compliance policies can help prevent the installation of outdated browser versions across organizational devices. From a defensive posture perspective, deploying network-level filtering and web content analysis tools can block access to known malicious domains hosting exploit kits targeting this vulnerability. Security awareness training for users remains essential to reduce the likelihood of interacting with suspicious links or downloading untrusted HTML files that might trigger such exploits.
This incident aligns with common weakness enumeration categories related to memory safety, specifically those involving improper resource management and boundary checks during dynamic operations. It also reflects tactics observed in advanced persistent threat campaigns where browser vulnerabilities are leveraged as initial access vectors before attempting privilege escalation. The ATT&CK framework categorizes this type of activity under techniques that involve exploiting software flaws for execution within a constrained environment. Continuous monitoring for anomalous behavior originating from the Chrome process and maintaining strict sandboxing policies remain vital components of a comprehensive defense-in-depth strategy against such memory corruption threats.