CVE-2026-4462: Google Chrome Out of Bounds Read Flaw

CVE-2026-4462 Overview

CVE-2026-4462 is an out-of-bounds read vulnerability in the Blink rendering engine used by Google Chrome. This memory corruption flaw allows a remote attacker to perform unauthorized memory access via a specially crafted HTML page. The vulnerability was rated with high severity by the Chromium security team and affects Google Chrome versions prior to 146.0.7680.153.

The out-of-bounds read vulnerability (CWE-125) in Blink can be triggered when processing malicious web content, potentially allowing attackers to read sensitive information from memory or cause the browser to crash.

Critical Impact

Remote attackers can exploit this vulnerability by tricking users into visiting a malicious webpage, potentially leading to information disclosure, memory corruption, or browser crashes across all major operating systems.

Affected Products

• Google Chrome versions prior to 146.0.7680.153
• Affected on Microsoft Windows
• Affected on Apple macOS
• Affected on Linux

Discovery Timeline

• 2026-03-20 - CVE-2026-4462 published to NVD
• 2026-03-20 - Last updated in NVD database

Technical Details for CVE-2026-4462

Vulnerability Analysis

The vulnerability resides in Google Chrome's Blink rendering engine, which is responsible for parsing and rendering web content including HTML, CSS, and JavaScript. An out-of-bounds read condition occurs when the engine improperly handles certain HTML elements or page structures, causing it to read memory beyond allocated buffer boundaries.

This type of vulnerability can lead to information disclosure if the attacker is able to read sensitive data from adjacent memory regions. In some cases, out-of-bounds reads can also be leveraged to bypass security mechanisms such as ASLR (Address Space Layout Randomization) by leaking memory addresses, potentially enabling further exploitation.

The vulnerability requires user interaction in the form of visiting a malicious webpage, but once triggered, the exploitation can occur without any additional user action.

Root Cause

The root cause of CVE-2026-4462 is an out-of-bounds read (CWE-125) in the Blink rendering engine. This occurs when the code fails to properly validate array indices or buffer boundaries before accessing memory. When parsing or rendering specific HTML page constructs, the engine attempts to read from a memory location that exceeds the allocated buffer size.

This type of memory safety issue is common in C/C++ codebases where manual memory management is required and boundary checks are not consistently enforced across all code paths.

Attack Vector

The attack vector for CVE-2026-4462 is network-based, requiring the victim to visit an attacker-controlled or compromised website containing a specially crafted HTML page. The attack requires no authentication or special privileges, only user interaction to navigate to the malicious page.

An attacker could exploit this vulnerability by:

1. Hosting a malicious webpage containing specially crafted HTML content designed to trigger the out-of-bounds read
2. Distributing links to the malicious page via phishing emails, social media, or web advertisements
3. Compromising legitimate websites to serve the malicious content
4. Using the vulnerability to leak memory contents or crash the browser, potentially chaining with other vulnerabilities for more severe impact

Detection Methods for CVE-2026-4462

Indicators of Compromise

• Unexpected browser crashes or tab failures when visiting specific websites
• Abnormal memory access patterns or segmentation faults in Chrome crash reports
• Browser process termination with memory-related error codes
• Unusual network traffic patterns to previously unknown domains hosting exploit content

Detection Strategies

• Monitor endpoint telemetry for Google Chrome crash events with memory access violations
• Deploy web filtering solutions to block access to known malicious domains serving exploit code
• Implement browser version auditing to identify systems running vulnerable Chrome versions prior to 146.0.7680.153
• Use SentinelOne's behavioral AI to detect anomalous browser process behavior indicative of memory corruption exploitation

Monitoring Recommendations

• Enable Chrome's built-in crash reporting and review crash reports for patterns indicating exploitation attempts
• Configure SIEM rules to alert on multiple browser crashes from the same endpoint in a short timeframe
• Monitor network traffic for connections to known malicious infrastructure associated with browser exploit campaigns
• Leverage SentinelOne Singularity platform for real-time endpoint visibility and automated threat detection

How to Mitigate CVE-2026-4462

Immediate Actions Required

• Update Google Chrome to version 146.0.7680.153 or later immediately on all systems
• Enable automatic updates for Chrome to ensure future security patches are applied promptly
• Advise users to avoid clicking links from untrusted sources until patching is complete
• Consider temporarily restricting browser access on critical systems until the update is deployed

Patch Information

Google has released a security update that addresses CVE-2026-4462 in Chrome version 146.0.7680.153. Organizations should prioritize deploying this update across their fleet. Detailed patch information is available in the Chrome Stable Channel Update announcement.

Additional technical details about the vulnerability can be found in the Chromium Issue Tracker Entry.

Workarounds

• Enable site isolation in Chrome to limit the impact of renderer process compromises
• Implement strict content security policies on organizational websites to reduce attack surface
• Use browser extensions that block untrusted scripts and content from executing
• Deploy network-level protections to filter malicious web content before it reaches endpoints

# Verify Chrome version on Linux/macOS
google-chrome --version

# Force Chrome update on Windows via command line
"C:\Program Files\Google\Chrome\Application\chrome.exe" --check-for-update-interval=1

# Enable site isolation flag (if not already default)
google-chrome --enable-features=IsolateOrigins,site-per-process