CVE-2026-14071: Google Chrome Information Disclosure Flaw

CVE-2026-14071 Overview

CVE-2026-14071 is a side-channel information leakage vulnerability in the WebAudio component of Google Chrome versions prior to 150.0.7871.47. A remote attacker can leak cross-origin data by luring a user to a crafted HTML page. The flaw is classified under [CWE-1300] (Improper Protection of Physical Side Channels) and [CWE-203] (Observable Discrepancy). Google's Chromium team rated the underlying issue as Low security severity, while the National Vulnerability Database assigns a medium CVSS 3.1 base score.

Critical Impact
Remote attackers can bypass the Same-Origin Policy by exploiting timing or behavioral discrepancies in WebAudio, exposing confidential cross-origin content rendered in the victim's browser.

Affected Products

Google Chrome versions prior to 150.0.7871.47
Chrome deployments on Microsoft Windows, Apple macOS, and Linux
Chromium-based browsers embedding the affected WebAudio implementation

Discovery Timeline

2026-06-30 - CVE-2026-14071 published to the National Vulnerability Database
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-14071

Vulnerability Analysis

The vulnerability resides in Chrome's WebAudio API, which processes audio graphs directly in the renderer process. Side-channel discrepancies in how WebAudio nodes handle timing, buffer processing, or resource state allow an attacker's page to infer properties of cross-origin resources. Because WebAudio operates on data that may originate from other origins through AudioContext and related interfaces, observable differences in processing behavior break the isolation the Same-Origin Policy is intended to enforce.

Exploitation requires user interaction, as indicated by the CVSS vector requirement for the victim to visit an attacker-controlled page. Once loaded, the malicious page can construct audio graphs and measure the resulting side-channel signals to reconstruct data belonging to a different origin. The attack has no impact on integrity or availability but yields high confidentiality impact.

Root Cause

The root cause is an observable discrepancy [CWE-203] combined with insufficient protection of a physical or logical side channel [CWE-1300] within WebAudio processing. Timing or state variations correlate with cross-origin data, giving script running in one origin an oracle for content in another. See the Chromium Issue Tracker Entry for engineering details.

Attack Vector

The attack is delivered over the network through a crafted HTML page. A victim visiting the page executes JavaScript that programs a WebAudio graph and measures side-channel outputs. No authentication or elevated privileges are required. The vulnerability manifests entirely within the rendering process and does not require additional native code execution. Refer to the Google Chrome Stable Update advisory for release notes.

Detection Methods for CVE-2026-14071

Indicators of Compromise

Browser telemetry showing Chrome or Chromium builds older than 150.0.7871.47 in active use across the fleet.
Web traffic to unfamiliar domains that serve pages instantiating unusually complex AudioContext graphs shortly after page load.
Repeated cross-origin fetches from renderer processes correlated with audio-processing script activity.

Detection Strategies

Inventory installed browser versions using endpoint management data and flag Chrome instances below 150.0.7871.47.
Monitor web proxy and DNS logs for user visits to newly registered domains that host content abusing WebAudio APIs.
Correlate browser process telemetry with outbound connections to detect anomalous script execution patterns tied to WebAudio usage.

Monitoring Recommendations

Enable browser update compliance reporting through enterprise policy and alert on hosts that fall behind stable channel releases.
Ingest browser and proxy logs into a SIEM or data lake to hunt for pages combining cross-origin resource loads with WebAudio API calls.
Track EPSS movement for CVE-2026-14071, currently at 0.229% (13.6 percentile), to reprioritize as exploitation likelihood shifts.

How to Mitigate CVE-2026-14071

Immediate Actions Required

Upgrade Google Chrome to version 150.0.7871.47 or later on all Windows, macOS, and Linux endpoints.
Force restart of Chrome processes after deployment to ensure the patched binary is loaded.
Audit Chromium-based browsers and embedded WebViews for equivalent WebAudio fixes from their upstream vendors.

Patch Information

Google addressed CVE-2026-14071 in the Chrome Stable channel release 150.0.7871.47. Details are published in the Google Chrome Stable Update advisory, with engineering context available in the Chromium Issue Tracker Entry.

Workarounds

Enforce automatic Chrome updates through enterprise policy so users receive patched builds without manual action.
Restrict browsing on sensitive systems using URL allowlists until the patched Chrome version is deployed everywhere.
Where feasible, disable JavaScript for high-risk browsing profiles handling sensitive cross-origin data.

bash

# Verify installed Chrome version on Linux and Windows endpoints
google-chrome --version
reg query "HKLM\Software\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv