CVE-2026-14051: Google Chrome Information Disclosure Flaw

CVE-2026-14051 Overview

CVE-2026-14051 is an uninitialized memory use vulnerability in the GamepadAPI component of Google Chrome versions prior to 150.0.7871.47. The flaw allows a remote attacker who has already compromised the renderer process to read potentially sensitive data from process memory. Exploitation requires a crafted HTML page and user interaction. The Chromium project rated the underlying security severity as Low, while the National Vulnerability Database assigned a higher score reflecting confidentiality impact. The weakness is tracked under CWE-457: Use of Uninitialized Variable.

Critical Impact
Attackers with an existing renderer foothold can extract residual process memory contents through the GamepadAPI, potentially exposing sensitive information from other browsing contexts.

Affected Products

Google Chrome prior to 150.0.7871.47
Chrome on Microsoft Windows, Apple macOS, and Linux desktop platforms
Chromium-based browsers that share the vulnerable GamepadAPI code path

Discovery Timeline

2026-06-30 - CVE-2026-14051 published to NVD
2026-07-01 - Last updated in NVD database
Google released the fix in the Chrome Stable channel via the Chrome Desktop Update advisory

Technical Details for CVE-2026-14051

Vulnerability Analysis

The vulnerability resides in Chrome's GamepadAPI implementation, which exposes connected controller state to web content through JavaScript bindings. The API returns structured data describing buttons, axes, and haptic actuators. A code path within this subsystem reads a variable or structure field before it is fully initialized. When JavaScript reads the resulting object, the response contains uninitialized bytes drawn from previously used memory in the renderer process. This behavior is categorized under CWE-457 and is confirmed in the Chromium Issue Tracker Entry.

Root Cause

The root cause is a missing initialization step in a memory region returned to script by the GamepadAPI. Chrome's renderer allocates buffers or structures to describe gamepad state, but at least one field is populated conditionally. When the conditional path is not taken, the field retains whatever bytes existed in that allocation. Those bytes may include pointers, tokens, or fragments of prior web content processed by the renderer.

Attack Vector

Exploitation requires two conditions. First, the attacker must already control the renderer process through a separate bug or malicious extension. Second, a user must load a crafted HTML page that invokes the GamepadAPI in a specific sequence. The malicious page repeatedly queries gamepad state, harvests the leaked bytes, and transmits them to an attacker-controlled endpoint. The leaked memory can then be used to defeat address space layout randomization or to stage a follow-on sandbox escape.

No public proof-of-concept is available. Refer to the Chromium Issue Tracker Entry for additional technical context.

Detection Methods for CVE-2026-14051

Indicators of Compromise

Chrome browser processes running versions earlier than 150.0.7871.47 in enterprise inventories
Unusual outbound POST or WebSocket traffic from Chrome renderer processes following interaction with attacker-controlled pages
Web pages that repeatedly poll navigator.getGamepads() without a corresponding user interaction pattern
Renderer process crashes or anomalous memory access patterns preceding data exfiltration attempts

Detection Strategies

Inventory installed Chrome versions across managed endpoints and flag any build below 150.0.7871.47
Monitor renderer child processes for chained behavior indicating prior renderer compromise, such as unexpected sandbox interactions
Inspect browser extension telemetry for unsigned or newly installed extensions that request broad host permissions
Correlate web navigation logs with outbound connections to identify pages performing GamepadAPI-based memory reads

Monitoring Recommendations

Ingest browser process telemetry and DNS logs into a centralized analytics platform for cross-source correlation
Alert on Chrome installations that fail to update within the defined patching window
Track user interaction with untrusted domains that request gamepad permissions
Review endpoint detection alerts for renderer exploit chains that could serve as the required first-stage compromise

How to Mitigate CVE-2026-14051

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all Windows, macOS, and Linux endpoints
Force browser restart through enterprise management tooling to ensure the patched binary is loaded
Audit and remove untrusted browser extensions that could serve as the initial renderer compromise vector
Restrict use of legacy Chromium-based applications that embed outdated rendering engines

Patch Information

Google released a fix in the Chrome Stable channel. Administrators should deploy the update referenced in the Google Chrome Desktop Update advisory. The corresponding Chromium bug is tracked at the Chromium Issue Tracker Entry. Enterprise deployments using managed policies should verify that automatic updates are enabled and that the TargetVersionPrefix policy does not pin browsers to an older release.

Workarounds

Disable the GamepadAPI where feasible through enterprise policy or a content security proxy that strips gamepad permissions
Block access to untrusted web content using URL filtering and DNS controls until patches are fully deployed
Enforce site isolation and strict same-origin policies to limit cross-context data exposure from a compromised renderer
Remove or disable browser extensions that are not required for business function

bash

# Verify installed Chrome version on Linux and macOS endpoints
google-chrome --version

# Windows: query installed Chrome version via registry
reg query "HKLM\Software\Google\Chrome\BLBeacon" /v version

# Enforce minimum version via Chrome Enterprise policy (JSON)
# Place in the managed policies directory for your platform
{
  "BrowserSignin": 1,
  "ExtensionInstallBlocklist": ["*"],
  "URLBlocklist": ["*://*/*gamepad*"]
}