CVE-2026-5879: Google Chrome ANGLE RCE Vulnerability

CVE-2026-5879 Overview

CVE-2026-5879 is an improper input validation vulnerability affecting the ANGLE (Almost Native Graphics Layer Engine) component in Google Chrome on Mac systems. The vulnerability allows remote attackers to execute arbitrary code within the browser's sandbox by enticing users to visit a specially crafted HTML page. ANGLE serves as Chrome's default backend for translating OpenGL ES API calls to platform-native graphics APIs, making it a critical component for rendering web content.

Critical Impact

Remote attackers can achieve arbitrary code execution inside Chrome's sandbox on Mac systems through malicious web pages that exploit insufficient input validation in the ANGLE graphics layer.

Affected Products

• Google Chrome on Mac prior to version 147.0.7727.55
• Chromium-based browsers on Mac utilizing the vulnerable ANGLE component

Discovery Timeline

• 2026-04-08 - CVE-2026-5879 published to NVD
• 2026-04-08 - Last updated in NVD database

Technical Details for CVE-2026-5879

Vulnerability Analysis

This vulnerability stems from insufficient validation of untrusted input within the ANGLE graphics translation layer. ANGLE is responsible for converting WebGL and OpenGL ES calls into native DirectX, Metal, or OpenGL calls depending on the platform. On Mac systems, ANGLE typically translates to Metal or native OpenGL backends.

The improper input validation allows attackers to craft malicious graphics commands that bypass expected bounds checks or type validation. When processed by the ANGLE layer, these malformed inputs can trigger memory corruption or other unsafe conditions that lead to code execution within the renderer process sandbox.

While the code execution is confined to Chrome's sandbox—limiting immediate access to the underlying operating system—attackers could potentially chain this vulnerability with sandbox escape exploits for full system compromise. The attack requires user interaction in the form of visiting a malicious webpage, but no additional authentication or special conditions are necessary.

Root Cause

The root cause is classified under CWE-20 (Improper Input Validation). The ANGLE component fails to adequately validate parameters or data structures passed from untrusted web content before processing them for graphics rendering operations. This insufficient validation allows specially crafted input to reach code paths that assume sanitized data, leading to exploitable conditions.

Attack Vector

The attack vector involves serving malicious HTML content to Mac users running vulnerable versions of Google Chrome. The attacker crafts a webpage containing WebGL or Canvas rendering operations that generate malformed graphics commands. When the victim's browser processes this page, the malicious input flows through the ANGLE layer where insufficient validation allows exploitation.

The exploitation mechanism involves:

1. A victim browsing to an attacker-controlled or compromised website
2. The malicious page initiating WebGL or graphics rendering operations
3. Crafted input bypassing validation checks in the ANGLE component
4. The invalid input triggering memory corruption or unsafe execution
5. Arbitrary code execution occurring within the browser's sandbox context

Technical details and proof-of-concept information may be available through the Chromium Issue Tracker once the vulnerability details are publicly disclosed.

Detection Methods for CVE-2026-5879

Indicators of Compromise

• Unusual Chrome renderer process crashes on Mac systems, particularly during graphics-intensive web browsing
• WebGL-related error messages in Chrome's console output indicating malformed rendering commands
• Memory corruption signatures or crash dumps indicating exploitation attempts in the ANGLE component
• Network traffic to suspicious domains serving content with complex WebGL operations

Detection Strategies

• Monitor for anomalous Chrome process behavior including unexpected crashes in renderer processes on Mac endpoints
• Implement network-based detection for HTML pages containing obfuscated or unusually complex WebGL shader code
• Deploy endpoint detection solutions capable of identifying exploitation attempts targeting browser graphics components
• Enable Chrome's built-in crash reporting and monitor for patterns consistent with ANGLE exploitation

Monitoring Recommendations

• Configure Chrome Enterprise policies to enable enhanced crash reporting for centralized monitoring
• Implement browser telemetry collection to identify endpoints visiting suspicious domains with graphics-heavy content
• Monitor Mac endpoints for signs of sandbox escape attempts that may follow initial ANGLE exploitation
• Review Chrome update status across the fleet to ensure vulnerable versions are identified and prioritized

How to Mitigate CVE-2026-5879

Immediate Actions Required

• Update Google Chrome on all Mac systems to version 147.0.7727.55 or later immediately
• Enable automatic updates for Chrome to ensure timely patching of future vulnerabilities
• Consider temporarily disabling WebGL via Chrome flags (chrome://flags/#disable-webgl) on critical systems until patching is complete
• Implement web filtering to block access to known malicious domains serving exploit content

Patch Information

Google has released Chrome version 147.0.7727.55 which addresses this vulnerability. Detailed information about the security update is available in the Google Chrome Stable Channel Update announcement. Organizations should prioritize deployment of this update to all Mac endpoints running Google Chrome.

The fix addresses the input validation gap in the ANGLE component, ensuring that untrusted graphics data is properly sanitized before processing.

Workarounds

• Disable WebGL in Chrome by navigating to chrome://flags/#disable-webgl and setting it to "Disabled" (impacts web application functionality)
• Use browser isolation technologies to contain potential exploitation to isolated environments
• Implement network-level filtering to block access to untrusted websites until systems are patched
• Consider using alternative browsers temporarily on Mac systems where Chrome cannot be immediately updated

# Chrome Enterprise policy to disable WebGL (deploy via MDM)
# Create or modify Chrome managed preferences
defaults write com.google.Chrome WebGLEnabled -bool false

# Verify Chrome version on Mac
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Force Chrome update check
# Users can manually check: Chrome menu > About Google Chrome