CVE-2026-7341: Google Chrome WebRTC Use-After-Free Flaw

CVE-2026-7341 Overview

CVE-2026-7341 is a use-after-free vulnerability in the WebRTC component of Google Chrome prior to version 147.0.7727.138. This memory corruption flaw allows a remote attacker to potentially execute arbitrary code within the browser's sandbox by convincing a user to visit a maliciously crafted HTML page. The vulnerability has been assigned a high severity rating by the Chromium security team.

Critical Impact

Successful exploitation could allow attackers to execute arbitrary code within Chrome's sandbox environment, potentially leading to further exploitation of sandbox escape vulnerabilities for full system compromise.

Affected Products

• Google Chrome versions prior to 147.0.7727.138
• Chromium-based browsers using vulnerable WebRTC implementations
• Desktop platforms (Windows, macOS, Linux) running affected Chrome versions

Discovery Timeline

• 2026-04-28 - CVE-2026-7341 published to NVD
• 2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-7341

Vulnerability Analysis

This vulnerability is classified as CWE-416 (Use After Free), a critical class of memory corruption bugs that occur when a program continues to use memory after it has been freed. In the context of WebRTC, this involves improper memory management during real-time communication processing within the browser.

WebRTC is a complex component that handles peer-to-peer audio, video, and data communication directly in the browser. The use-after-free condition in this implementation can be triggered through specially crafted HTML content that manipulates WebRTC objects in a way that causes the browser to reference deallocated memory.

When exploited, the attacker gains the ability to execute arbitrary code within Chrome's sandbox. While the sandbox provides a layer of defense, code execution within this environment still presents significant risk, particularly if combined with sandbox escape vulnerabilities.

Root Cause

The root cause is improper memory lifecycle management in Chrome's WebRTC implementation. Specifically, an object is freed but a dangling pointer to that memory remains accessible. When subsequent operations attempt to access the freed memory through this dangling reference, the attacker can manipulate the memory contents to achieve code execution.

Use-after-free vulnerabilities typically arise from:

• Asynchronous callbacks referencing objects that have been destroyed
• Complex object ownership semantics leading to premature deallocation
• Race conditions between object destruction and access in multi-threaded contexts

Attack Vector

The attack requires user interaction—specifically, the victim must navigate to an attacker-controlled webpage containing the malicious HTML payload. The exploitation flow involves:

1. Victim visits a webpage containing the crafted HTML and JavaScript
2. The malicious code triggers the use-after-free condition in the WebRTC component
3. Attacker-controlled data is placed in the freed memory region
4. The browser accesses the corrupted memory, leading to code execution
5. Arbitrary code runs within Chrome's sandboxed renderer process

The vulnerability mechanism involves triggering specific WebRTC operations that cause memory to be freed while references to that memory still exist. For detailed technical information, see the Chromium Issue Tracker Entry (access may be restricted until the fix is widely deployed).

Detection Methods for CVE-2026-7341

Indicators of Compromise

• Unusual browser crashes or instability, particularly when visiting unfamiliar websites
• Unexpected WebRTC-related errors in browser console logs
• Anomalous network connections initiated by the browser process
• Memory access violation events in system logs associated with Chrome processes

Detection Strategies

• Monitor for Chrome crash reports referencing WebRTC components or memory access violations
• Implement network monitoring to detect connections to known malicious domains serving exploit code
• Deploy endpoint detection solutions capable of identifying memory corruption exploitation techniques
• Utilize browser version inventory to identify systems running vulnerable Chrome versions

Monitoring Recommendations

• Enable Chrome crash reporting and aggregate data for anomaly detection
• Monitor for suspicious JavaScript patterns associated with WebRTC manipulation in web traffic
• Implement SentinelOne's behavioral AI detection to identify post-exploitation activity
• Configure alerting for Chrome processes exhibiting unusual memory access patterns

How to Mitigate CVE-2026-7341

Immediate Actions Required

• Update Google Chrome to version 147.0.7727.138 or later immediately
• Enable automatic updates in Chrome to ensure timely patching of future vulnerabilities
• Review and restrict browsing to trusted websites until patching is complete
• Consider temporarily disabling WebRTC functionality if updates cannot be immediately applied

Patch Information

Google has addressed this vulnerability in Chrome version 147.0.7727.138. The fix resolves the memory management issue in the WebRTC component that allowed the use-after-free condition. Organizations should prioritize updating all Chrome installations to this version or later.

For detailed patch information, refer to the Google Chrome Desktop Update announcement.

Workarounds

• Disable WebRTC in Chrome via browser flags (chrome://flags/#enable-webrtc) as a temporary measure
• Use browser extensions that block WebRTC functionality until patching is complete
• Implement network-level controls to block access to untrusted websites
• Deploy web filtering solutions to prevent access to known malicious domains

# Verify Chrome version from command line
# Windows
"C:\Program Files\Google\Chrome\Application\chrome.exe" --version

# macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Linux
google-chrome --version

# Expected output should show version 147.0.7727.138 or higher