CVE-2026-7927: Google Chrome Type Confusion RCE Flaw

CVE-2026-7927 Overview

CVE-2026-7927 is a type confusion vulnerability in the V8 JavaScript runtime of Google Chrome prior to version 148.0.7778.96. A remote attacker can execute arbitrary code inside the browser sandbox by serving a crafted HTML page to a target user. The flaw is tracked under CWE-843: Access of Resource Using Incompatible Type and affects Chrome on Windows, macOS, and Linux. Google rates the Chromium security severity as High and addressed the issue in the Stable channel desktop update.

Critical Impact
Successful exploitation enables arbitrary code execution within the Chrome renderer sandbox after a user visits a malicious page, providing a foothold for further sandbox escape and post-exploitation activity.

Affected Products

Google Chrome prior to 148.0.7778.96 on Microsoft Windows
Google Chrome prior to 148.0.7778.96 on Apple macOS
Google Chrome prior to 148.0.7778.96 on Linux

Discovery Timeline

2026-05-06 - CVE-2026-7927 published to NVD
2026-05-06 - Last updated in NVD database
2026-05 - Google releases Stable channel desktop update addressing the issue

Technical Details for CVE-2026-7927

Vulnerability Analysis

The vulnerability is a type confusion condition in the Chrome runtime, the V8 JavaScript and WebAssembly engine. Type confusion occurs when code allocates or accesses a resource using one type but later operates on it as an incompatible type. In V8, this typically arises when JIT-compiled code makes incorrect assumptions about object shapes, hidden classes, or element kinds after speculative optimization.

When the engine treats an object of one type as another, it bypasses bounds and field-layout checks. An attacker controlling the JavaScript on a malicious page can groom the heap to place attacker-chosen values where the runtime expects a different object layout. This primitive is commonly leveraged into arbitrary read and write within the renderer process, leading to arbitrary code execution inside the sandbox.

Root Cause

The defect resides in V8's runtime type tracking. The optimizer or runtime helper accepts an object whose effective type does not match the type the generated code was specialized for, violating the invariant captured by [CWE-843]. See the Chromium Issue Tracker entry for tracking metadata.

Attack Vector

Exploitation is remote and requires user interaction. A target user must load a crafted HTML page in a vulnerable Chrome build. The page delivers JavaScript that triggers the type confusion, builds memory corruption primitives, and executes attacker-supplied code inside the renderer sandbox. No authentication is required, and the attack is delivered over standard network paths, including drive-by downloads, malvertising, and compromised sites. Refer to the Google Chrome update announcement for vendor details.

Detection Methods for CVE-2026-7927

Indicators of Compromise

Chrome processes spawning unexpected child processes such as cmd.exe, powershell.exe, bash, or osascript shortly after browsing activity.
Renderer processes performing outbound connections to uncategorized or newly registered domains immediately after page load.
Crash dumps or chrome.exe renderer crashes referencing V8 frames following visits to attacker-controlled pages.

Detection Strategies

Inventory installed Chrome versions across endpoints and flag any build older than 148.0.7778.96.
Hunt browser telemetry for sequences of suspicious DOM and JavaScript activity followed by anomalous process or file creation by chrome.exe.
Correlate web proxy logs with endpoint process telemetry to identify users who loaded suspicious HTML pages preceding renderer crashes.

Monitoring Recommendations

Alert on Chrome renderer processes writing executables, scripts, or scheduled tasks to disk.
Monitor for unexpected loading of debugging or injection-related modules into Chrome processes.
Track Chrome update compliance through configuration management and surface endpoints lagging the patched version.

How to Mitigate CVE-2026-7927

Immediate Actions Required

Update Google Chrome to version 148.0.7778.96 or later on Windows, macOS, and Linux endpoints.
Force-restart browser sessions after deployment so the patched binary is loaded by all renderer and GPU processes.
Verify enterprise update channels and group policies are not pinning Chrome to an outdated build.

Patch Information

Google released the fix in the Stable channel desktop update tracked in the Google Chrome update announcement. Apply Chrome 148.0.7778.96 or later. For managed deployments, push the update through Google Update, Microsoft Intune, Jamf, or the relevant Linux package manager and confirm version compliance through endpoint inventory.

Workarounds

Restrict browsing to trusted sites using web filtering or proxy allowlists until patching is complete.
Deploy Chrome enterprise policies to disable JIT for untrusted sites where supported, reducing the V8 attack surface.
Use site isolation and standard non-administrative user accounts to limit post-exploitation impact.

bash

# Verify installed Chrome version on Linux
google-chrome --version

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

# Verify installed Chrome version on Windows (PowerShell)
(Get-Item "$Env:ProgramFiles\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion