CVE-2026-4459 Overview
CVE-2026-4459 is an out-of-bounds read and write vulnerability affecting the WebAudio component in Google Chrome prior to version 146.0.7680.153. This memory corruption flaw enables remote attackers to potentially exploit heap corruption through a specially crafted HTML page. Successful exploitation could allow an attacker to achieve arbitrary code execution on the target system when a user visits a malicious webpage.
Critical Impact
Remote attackers can exploit heap corruption via crafted HTML pages, potentially leading to arbitrary code execution with user-level privileges across Windows, macOS, and Linux platforms.
Affected Products
- Google Chrome versions prior to 146.0.7680.153
- Apple macOS (Chrome installations)
- Microsoft Windows (Chrome installations)
- Linux (Chrome installations)
Discovery Timeline
- 2026-03-20 - CVE-2026-4459 published to NVD
- 2026-03-20 - Last updated in NVD database
Technical Details for CVE-2026-4459
Vulnerability Analysis
This vulnerability exists within the WebAudio API implementation in Google Chrome. The WebAudio API provides powerful audio processing capabilities for web applications, handling complex audio graph operations and real-time audio manipulation. Due to improper bounds checking in the audio processing routines, an attacker can trigger an out-of-bounds read and write condition.
The flaw allows memory corruption on the heap, which can be weaponized to achieve arbitrary code execution. The vulnerability requires user interaction—specifically, the victim must navigate to a malicious web page containing the crafted HTML payload. Once triggered, the attacker can potentially read sensitive memory contents or overwrite critical heap structures to hijack program execution flow.
Root Cause
The root cause stems from insufficient boundary validation in the WebAudio component's memory handling operations. When processing audio data through certain WebAudio nodes, the code fails to properly validate buffer sizes and array indices before performing read and write operations. This leads to CWE-125 (Out-of-bounds Read) conditions where memory outside the intended buffer can be accessed and corrupted.
Attack Vector
The attack is network-based and requires user interaction. An attacker would craft a malicious HTML page containing JavaScript code that manipulates WebAudio API objects in a specific sequence to trigger the out-of-bounds condition. The attack scenario typically involves:
- Attacker hosts or injects malicious content on a webpage
- Victim browses to the malicious page using a vulnerable Chrome version
- The crafted JavaScript triggers the WebAudio vulnerability
- Heap memory is corrupted, potentially allowing code execution
- Attacker gains code execution context within the browser sandbox
The vulnerability can be exploited through a crafted HTML page that abuses the WebAudio API to trigger out-of-bounds memory access. The attacker would leverage JavaScript to create and manipulate audio nodes in ways that cause the browser to read or write beyond allocated buffer boundaries. For detailed technical information, see the Chromium Issue Tracker Entry.
Detection Methods for CVE-2026-4459
Indicators of Compromise
- Suspicious Chrome crash reports related to WebAudio or audio processing components
- Unusual heap corruption or memory access violation events in browser telemetry
- Presence of malicious HTML/JavaScript files containing WebAudio API manipulation patterns
- Network connections to known malicious domains hosting exploit pages
Detection Strategies
- Monitor for unexpected Chrome renderer process crashes associated with audio processing
- Deploy browser-based threat protection capable of detecting malicious JavaScript patterns
- Implement endpoint detection rules to identify heap spray or corruption techniques targeting browsers
- Use network inspection to identify pages containing suspicious WebAudio API usage patterns
Monitoring Recommendations
- Enable Chrome's built-in Safe Browsing feature for real-time protection against malicious pages
- Configure centralized logging for browser crash events across the enterprise
- Deploy SentinelOne Singularity Platform for endpoint visibility and real-time threat detection
- Monitor for anomalous browser behavior indicative of exploitation attempts
How to Mitigate CVE-2026-4459
Immediate Actions Required
- Update Google Chrome to version 146.0.7680.153 or later immediately
- Enable automatic browser updates to ensure timely security patches
- Review and restrict access to untrusted websites through web filtering policies
- Deploy endpoint protection capable of detecting browser-based exploitation attempts
Patch Information
Google has released a security update addressing this vulnerability in Chrome version 146.0.7680.153. The patch is available through Chrome's automatic update mechanism. Administrators can verify the installed version by navigating to chrome://settings/help in the browser. For enterprise deployments, the update can be deployed through standard software distribution mechanisms.
For official patch details, see the Chrome Releases Desktop Update.
Workarounds
- Restrict users from accessing untrusted websites until patching is complete
- Consider temporarily disabling WebAudio functionality via enterprise Chrome policies if critical workflows permit
- Implement web filtering to block known malicious domains
- Enable site isolation features in Chrome to limit exploitation impact
# Verify Chrome version on Windows
"C:\Program Files\Google\Chrome\Application\chrome.exe" --version
# Verify Chrome version on Linux/macOS
google-chrome --version
# Force Chrome update check via policy (Windows)
reg add "HKLM\SOFTWARE\Policies\Google\Update" /v "AutoUpdateCheckPeriodMinutes" /t REG_DWORD /d 60 /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
