CVE-2026-113178 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Views 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-2023-6938 represents a critical memory corruption flaw within the Views component of Google Chrome on macOS, specifically affecting versions prior to 156.0.8078.47. This issue stems from improper handling of data structures during rendering operations, which can lead to out-of-bounds reads or writes when processing crafted HTML content. The severity is classified as Medium by the Chromium security team, reflecting its potential for exploitation under specific conditions while acknowledging that it may not always result in immediate full system compromise without additional vectors.
From a technical perspective, this vulnerability falls squarely within the CWE-125 category of Out-of-bounds Read, which occurs when software reads data from memory locations beyond the intended boundaries. In the context of browser engines like Blink and V8 used by Chrome, such errors often arise during complex layout calculations or style resolution phases where pointer arithmetic is performed based on user-supplied input. An attacker can craft an HTML page containing malicious JavaScript that triggers these flawed code paths, causing the browser to access memory regions it should not have permission to read. This behavior violates the fundamental principle of least privilege enforced by modern sandboxing mechanisms designed to isolate web content from sensitive system resources and other processes.
The operational impact of this vulnerability is significant because it allows a remote attacker to potentially leak information stored in adjacent memory blocks within the Chrome process space. While the browser's sandbox architecture provides robust isolation, successful exploitation could enable an adversary to exfiltrate sensitive data such as cookies, session tokens, or internal state variables that reside near the vulnerable buffer. This capability undermines the confidentiality guarantees provided by the browsing environment and can serve as a stepping stone for more severe attacks if combined with other vulnerabilities in different components of the browser stack.
In terms of threat modeling and industry standards, this incident aligns with ATT&CK technique T1005 Data from Local System which describes data staged locally before exfiltration, although here it refers to initial access within the sandboxed environment rather than post-exploitation staging. It also relates to CWE-284 Improper Access Control since the core issue involves bypassing intended memory protection boundaries through logical errors in code execution flow. Security researchers emphasize that while single vulnerabilities like this may have limited direct impact, they are frequently leveraged as part of multi-stage attack chains targeting high-value targets or enterprise environments where Chrome is widely deployed.
Mitigation strategies primarily involve updating to the latest stable version of Google Chrome which includes patches for these memory safety issues. Organizations should enforce automated update policies across all endpoints running macOS to ensure timely application of security fixes. Additionally, implementing strict content security policies and disabling unnecessary browser features can reduce the attack surface available to remote attackers attempting to deliver malicious payloads via email or compromised websites. Regular auditing of third-party extensions is also recommended as they may introduce additional vectors for triggering similar memory corruption bugs if not properly sandboxed themselves.