CVE-2026-5283: Google Chrome Information Disclosure Flaw

CVE-2026-5283 Overview

CVE-2026-5283 is an inappropriate implementation vulnerability in ANGLE (Almost Native Graphics Layer Engine) in Google Chrome prior to version 146.0.7680.178. This security flaw allows a remote attacker to leak cross-origin data via a crafted HTML page, potentially exposing sensitive information from different web origins.

Critical Impact

This vulnerability enables cross-origin data leakage, which could allow attackers to bypass the browser's same-origin policy and access sensitive data from other websites the user is authenticated to.

Affected Products

• Google Chrome versions prior to 146.0.7680.178
• Google Chrome on Microsoft Windows
• Google Chrome on Apple macOS
• Google Chrome on Linux

Discovery Timeline

• April 1, 2026 - CVE-2026-5283 published to NVD
• April 1, 2026 - Last updated in NVD database

Technical Details for CVE-2026-5283

Vulnerability Analysis

This vulnerability stems from an inappropriate implementation in ANGLE, which is Chrome's graphics abstraction layer responsible for translating OpenGL ES calls to the underlying graphics API of the operating system (DirectX on Windows, OpenGL on macOS/Linux). The flaw allows attackers to craft malicious HTML pages that can leak data across origin boundaries, violating the fundamental same-origin security policy that browsers rely on to isolate web content.

The vulnerability is classified under CWE-285 (Improper Authorization), indicating that the ANGLE component fails to properly enforce access control checks when handling certain graphics operations. This weakness can be exploited remotely through network-based attacks, though user interaction is required—specifically, the victim must visit a malicious webpage.

Root Cause

The root cause lies in improper authorization controls within the ANGLE graphics layer. ANGLE serves as a translation layer between WebGL/OpenGL ES API calls and the native graphics APIs. The inappropriate implementation allows certain graphics operations to inadvertently expose data that should be restricted by cross-origin boundaries. This represents an authorization bypass where the graphics subsystem fails to properly validate the origin context of rendering operations.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker would need to:

1. Create a malicious HTML page containing crafted WebGL or graphics content
2. Trick a victim into visiting the malicious page (via phishing, malicious ads, or compromised websites)
3. The crafted graphics operations exploit the ANGLE implementation flaw to read pixel data or other graphics buffer information from cross-origin content
4. Exfiltrate the leaked data back to attacker-controlled infrastructure

The vulnerability specifically targets the graphics rendering pipeline, where cross-origin data could be exposed through improperly sanitized framebuffer operations or texture sampling from cross-origin resources.

Detection Methods for CVE-2026-5283

Indicators of Compromise

• Unusual WebGL or canvas rendering activity on web pages
• Unexpected cross-origin resource requests combined with heavy graphics API usage
• Browser crash reports or anomalies related to ANGLE or graphics subsystems
• Network traffic exfiltrating encoded image or graphics data to unknown external domains

Detection Strategies

• Monitor for suspicious HTML pages that combine cross-origin iframes with intensive WebGL operations
• Implement browser-level telemetry to detect abnormal graphics API call patterns
• Deploy endpoint detection solutions capable of identifying Chrome processes exhibiting unusual memory access patterns
• Utilize SentinelOne Singularity to detect and alert on suspicious browser behavior indicative of exploitation attempts

Monitoring Recommendations

• Enable Chrome's built-in security logging and monitor for graphics-related security events
• Track Chrome version deployment across the organization to identify unpatched instances
• Monitor network traffic for data exfiltration patterns following visits to untrusted websites
• Implement web content filtering to block access to known malicious domains hosting exploit code

How to Mitigate CVE-2026-5283

Immediate Actions Required

• Update Google Chrome to version 146.0.7680.178 or later immediately
• Enable automatic updates for Chrome across all managed endpoints
• Audit all Chrome installations in your environment to identify vulnerable versions
• Consider implementing browser isolation for high-risk users until patching is complete

Patch Information

Google has released a security update addressing this vulnerability in Chrome version 146.0.7680.178. The patch corrects the inappropriate implementation in ANGLE to properly enforce cross-origin data access controls. Organizations should prioritize deploying this update across all systems running Google Chrome.

For detailed information about this security update, refer to the Google Chrome Release Update. Additional technical details may be available via the Chromium Issue Tracker #492131521.

Workarounds

• Disable WebGL in Chrome via chrome://flags/#disable-webgl as a temporary measure if patching is not immediately possible
• Implement strict Content Security Policy (CSP) headers on internal web applications to limit cross-origin resource loading
• Use browser isolation solutions to contain potential exploitation attempts
• Restrict browsing to trusted websites only on systems that cannot be immediately updated