CVE-2026-113077 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Core in Google Chrome on on Mac prior to 156.0.8078.47 allowed a remote attacker to potentially read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as CVE-2024-9353 represents a critical memory corruption flaw within the Core component of Google Chrome on macOS systems prior to version 156.0.8078.47. This defect is classified with a medium severity rating by the Chromium security team, indicating that while it may not immediately lead to full system compromise in all scenarios, it poses significant risks due to its potential for exploitation through standard web browsing activities. The root cause of this issue lies in improper handling of memory operations within the browser's core rendering engine or process management subsystems. Such flaws typically arise from errors like use-after-free conditions, buffer overflows, or integer arithmetic mistakes that result in invalid memory accesses. In the context of Chrome’s multi-process architecture, where each tab and plugin runs in a separate sandboxed environment to limit the blast radius of potential exploits, this specific vulnerability allows an attacker to bypass these isolation boundaries under certain conditions.
The operational impact of this vulnerability is primarily centered on unauthorized information disclosure. A remote attacker can craft a malicious HTML page containing specially designed JavaScript or embedded content that triggers the memory corruption flaw when loaded by a victim using an affected version of Chrome. Upon execution, the exploit leverages the corrupted state to read arbitrary memory locations inside the sandboxed renderer process. This capability enables the extraction of sensitive data such as session cookies, authentication tokens, private keys, or other confidential information stored in browser memory. Although the attacker remains within the confines of the sandbox for basic operations, gaining access to specific memory regions can facilitate further attacks, including cross-site scripting amplification, credential theft, or potentially leading to more severe vulnerabilities if combined with other weaknesses. The ability to read internal process memory undermines the fundamental security model that relies on strict isolation between untrusted web content and trusted browser components.
From a classification perspective, this vulnerability aligns closely with CWE-125 Out-of-bounds Read, which describes situations where software reads data past the end or before the beginning of the intended buffer. It also relates to CWE-416 Use After Free if the corruption stems from accessing memory that has already been deallocated but not yet reallocated for another purpose. In terms of offensive security frameworks, this exploit technique corresponds to ATT&CK tactic T1005 Data from Local System and specifically subtechnique T1005.004 Memory Dumping or T1078 Valid Accounts if used in conjunction with credential harvesting. The exploitation vector is classified as remote via the network (ATT&CK T1190), requiring only user interaction to load a malicious webpage, which makes it particularly dangerous in social engineering scenarios where users are tricked into visiting compromised sites.
Mitigation strategies for this vulnerability focus primarily on timely software updates and defensive browser configurations. The most effective remediation is upgrading Google Chrome to version 156.0.8078.47 or later, which includes patches addressing the underlying memory management errors in the Core component. Organizations should enforce automated update policies across all endpoints running macOS to ensure that security fixes are applied promptly without relying on individual user action. Additionally, enabling Safe Browsing features and restricting script execution for untrusted domains can reduce the attack surface by preventing the loading of potentially malicious content before it triggers the vulnerability. Security teams should also monitor network traffic for unusual patterns indicative of data exfiltration attempts following exposure to known vulnerable versions. Regular auditing of browser extensions is recommended as some third-party add-ons may interact with core components in ways that exacerbate memory safety issues, although this specific flaw appears intrinsic to the main application binary rather than external plugins.