CVE-2026-78906: Google Chrome ANGLE Race Condition Flaw

CVE-2026-78906 Overview

CVE-2026-78906 is a race condition vulnerability in ANGLE, the graphics abstraction layer used by Google Chrome to translate OpenGL ES calls to native graphics APIs. The flaw affects Google Chrome versions prior to 152.0.7977.65. A remote attacker can potentially execute arbitrary code outside the Chrome sandbox by convincing a user to visit a crafted HTML page. The vulnerability is tracked as CWE-362 and stems from concurrent access to shared graphics resources without proper synchronization. Google Chrome's security team rated the Chromium severity as Medium, while NVD scored it as High.

Critical Impact
Successful exploitation allows arbitrary code execution outside the Chrome sandbox, giving attackers a foothold on the underlying operating system.

Affected Products

Google Chrome for Desktop versions prior to 152.0.7977.65
Chromium-based browsers embedding vulnerable ANGLE builds
Applications relying on the affected ANGLE component through Chromium Embedded Framework builds

Discovery Timeline

2026-08-25 - CVE-2026-78906 published to NVD
2026-08-27 - Last updated in NVD database

Technical Details for CVE-2026-78906

Vulnerability Analysis

The vulnerability resides in ANGLE (Almost Native Graphics Layer Engine), which translates WebGL and OpenGL ES calls into Direct3D, Metal, or Vulkan commands. A race condition occurs when multiple threads access shared graphics state without adequate locking. An attacker who wins the race can corrupt memory in the GPU process, leading to code execution outside Chrome's renderer sandbox.

Exploitation requires network delivery through a crafted HTML page and user interaction to load the malicious content. The high attack complexity reflects the timing precision required to trigger the race window reliably. Successful attackers gain execution in the GPU process context, which historically has weaker sandbox constraints than the renderer.

Root Cause

The root cause is a [CWE-362] concurrent execution flaw involving improper synchronization of shared resources within ANGLE. When multiple threads interact with graphics buffers or state objects during WebGL command processing, the absence of proper mutual exclusion allows a Time-of-Check to Time-of-Use (TOCTOU) condition. This condition can be leveraged to manipulate object lifetime or trigger use-after-free style corruption in GPU memory.

Attack Vector

An attacker hosts a crafted HTML page that issues carefully sequenced WebGL calls designed to trigger the race window in ANGLE. When a victim visits the page, the malicious JavaScript exploits the timing flaw to corrupt GPU process memory. Successful exploitation escapes the Chrome sandbox and executes arbitrary code with the privileges of the browser process. No verified proof-of-concept code is publicly available at this time.

See the Chromium Issue Tracker #513923164 for additional technical context once the issue is unrestricted.

Detection Methods for CVE-2026-78906

Indicators of Compromise

Chrome GPU process (chrome.exe --type=gpu-process) spawning unexpected child processes or command shells
Unusual outbound network connections originating from the Chrome GPU process
Browser crash dumps referencing ANGLE modules such as libGLESv2.dll or libEGL.dll shortly before suspicious process activity
Chrome instances running versions prior to 152.0.7977.65 in enterprise inventory scans

Detection Strategies

Monitor process lineage for Chrome GPU processes that create non-standard child processes, which indicates a sandbox escape
Correlate WebGL-heavy browsing sessions with subsequent memory anomalies or crashes in the GPU process
Deploy behavioral analytics that flag graphics driver DLLs performing atypical operations such as file writes to user profile directories

Monitoring Recommendations

Ingest Chrome crash telemetry and match faulting modules against known ANGLE component names
Track browser version compliance across managed endpoints and alert on hosts below 152.0.7977.65
Alert on any Chrome subprocess creating persistence artifacts such as scheduled tasks or registry Run keys

How to Mitigate CVE-2026-78906

Immediate Actions Required

Update Google Chrome to version 152.0.7977.65 or later on all managed endpoints
Restart Chrome after updating to ensure the patched ANGLE binaries are loaded
Audit Chromium-based browsers (Edge, Brave, Opera, Vivaldi) and apply vendor updates that incorporate the ANGLE fix
Prioritize patching endpoints used by high-risk users who frequently browse untrusted content

Patch Information

Google released the fix in the Chrome Stable channel update documented in the Google Chrome Desktop Update. Enterprises should validate deployment through their update management infrastructure and confirm that endpoints report version 152.0.7977.65 or higher.

Workarounds

Disable hardware acceleration in Chrome via chrome://settings to reduce reliance on ANGLE until patching completes
Restrict WebGL through enterprise policy using the DefaultWebGLSetting administrative template where feasible
Enforce browsing restrictions that prevent access to untrusted sites through web filtering or isolation solutions

bash

# Enterprise policy example: disable WebGL via Chrome policy on Linux
cat <<EOF | sudo tee /etc/opt/chrome/policies/managed/disable_webgl.json
{
  "DefaultWebGLSetting": 2,
  "HardwareAccelerationModeEnabled": false
}
EOF