CVE-2026-4462 in Chrome
Summary
by MITRE • 03/20/2026
Out of bounds read in Blink in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 03/25/2026
This vulnerability represents a critical out of bounds memory read flaw within the Blink rendering engine of Google Chrome, affecting versions prior to 146.0.7680.153. The issue stems from insufficient bounds checking during HTML parsing and rendering operations, creating a scenario where maliciously crafted web content can trigger unauthorized memory access patterns. The vulnerability falls under the category of memory safety issues and is classified as a high severity threat by Chromium security standards, indicating significant potential for exploitation in real-world scenarios.
The technical implementation of this flaw occurs within the Blink engine's handling of malformed HTML content, where input validation mechanisms fail to properly constrain memory access boundaries. When processing specially crafted HTML pages, the renderer attempts to access memory locations beyond the allocated buffer boundaries, potentially exposing sensitive data from adjacent memory regions. This type of vulnerability typically arises from inadequate input sanitization and memory management practices within web rendering components, making it particularly dangerous as it can be exploited through standard web browsing activities without requiring any special privileges or user interaction beyond visiting a malicious website.
From an operational standpoint, this vulnerability presents a substantial risk to end users as it enables remote code execution capabilities through carefully constructed HTML payloads. Attackers can leverage this flaw to read arbitrary memory contents, potentially extracting sensitive information such as cryptographic keys, session tokens, or other confidential data stored in memory. The exploitability of this issue is enhanced by the fact that it operates entirely within the browser context, requiring no user interaction beyond visiting a compromised website. This aligns with common attack patterns documented in the attack technique framework, particularly those involving web-based exploitation and memory corruption vulnerabilities.
The mitigation strategy for this vulnerability primarily involves immediate deployment of the patched Chrome version 146.0.7680.153 or later, which includes enhanced bounds checking mechanisms and improved input validation routines. Organizations should prioritize patch management processes to ensure all affected systems receive updates promptly, as the vulnerability's high severity classification indicates significant risk exposure. Additionally, implementing web application firewalls, content security policies, and browser hardening measures can provide additional layers of protection against exploitation attempts. Security teams should monitor for any reported exploitation attempts and maintain comprehensive logging of browser activities to detect potential compromise indicators. This vulnerability exemplifies the importance of continuous security testing and the need for robust memory safety mechanisms in modern browser architectures, aligning with established security frameworks that emphasize the prevention of memory corruption vulnerabilities as fundamental to web security.