CVE-2026-14088: Google Chrome Information Disclosure Bug

CVE-2026-14088 Overview

CVE-2026-14088 is an uninitialized memory use vulnerability in the Canvas component of Google Chrome on Android. Versions prior to 150.0.7871.47 are affected. A remote attacker can craft a malicious HTML page that triggers the flaw when rendered by a victim's browser. Successful exploitation allows the attacker to read uninitialized data from Chrome's process memory, potentially exposing sensitive information from prior allocations. The issue is classified under CWE-457: Use of Uninitialized Variable. Chromium's own security team rates the underlying issue as Low severity, though the NVD score reflects the confidentiality impact.

Critical Impact
Remote attackers can leak potentially sensitive data from Chrome process memory by luring users to a crafted web page rendered through the Canvas API.

Affected Products

Google Chrome on Android versions prior to 150.0.7871.47
Google Android devices running vulnerable Chrome builds
Chromium-based browsers on Android sharing the affected Canvas rendering code

Discovery Timeline

2026-06-30 - CVE-2026-14088 published to the National Vulnerability Database
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-14088

Vulnerability Analysis

The flaw resides in the Canvas subsystem, which handles 2D drawing operations exposed to web content through the HTML <canvas> element. Chrome allocates internal buffers to hold pixel data, drawing state, or intermediate rendering results. In the affected code path, one or more of these buffers are read before all of their bytes have been initialized. When a page requests output from the Canvas API, residual memory contents from prior allocations may be returned to the attacker-controlled script. The confidentiality impact is rated High because leaked memory can include tokens, decoded resources, or fragments from other browsing contexts. User interaction is required, meaning the victim must load or interact with the attacker's page. The EPSS model estimates a low probability of near-term exploitation.

Root Cause

The root cause is a Use of Uninitialized Variable weakness [CWE-457] in the Canvas implementation. A memory region is allocated and then consumed by rendering or readback logic without a preceding write that fully populates it. The uninitialized bytes are then reflected back into script-accessible pixel data or derived outputs.

Attack Vector

Exploitation is network-based and requires user interaction. An attacker hosts a crafted HTML page that invokes specific Canvas operations designed to trigger the uninitialized read. When a victim on a vulnerable Android Chrome build visits the page, JavaScript can retrieve pixel or buffer data containing residual memory. The attacker does not need authentication or elevated privileges. See the Chromium Issue Tracker Entry for upstream tracking details.

Detection Methods for CVE-2026-14088

Indicators of Compromise

Android Chrome browsers reporting a version string below 150.0.7871.47 in User-Agent telemetry or MDM inventories.
Web traffic to unknown domains hosting pages that heavily exercise CanvasRenderingContext2D readback methods such as getImageData or toDataURL.
JavaScript files performing repeated Canvas allocations followed by immediate pixel extraction and network exfiltration.

Detection Strategies

Inventory managed Android devices and flag Chrome installations below the patched version.
Inspect proxy or DNS logs for user navigation to newly registered domains preceding suspicious outbound POST requests carrying base64-encoded image data.
Correlate mobile browsing telemetry with threat intelligence feeds tracking Chromium exploitation activity.

Monitoring Recommendations

Enable MDM-based version compliance policies that alert when Chrome on Android falls behind the current stable release.
Monitor egress traffic from mobile devices for anomalous transfers of image or binary payloads to non-corporate destinations.
Log and review Chrome update deferrals or Play Store restrictions that could delay patch deployment.

How to Mitigate CVE-2026-14088

Immediate Actions Required

Update Google Chrome on Android to version 150.0.7871.47 or later through the Google Play Store.
Push the updated Chrome build to managed Android devices using enterprise MDM policies without waiting for user-initiated updates.
Communicate to users the risk of visiting untrusted links until patching is complete.

Patch Information

Google addressed the vulnerability in Chrome 150.0.7871.47, released through the Android stable channel. Details are available in the Google Chrome Update Announcement. Distribution occurs automatically through the Google Play Store, but enforcement in enterprise environments should be verified.

Workarounds

Restrict browsing on Android devices to trusted domains through DNS filtering or secure web gateways until patches are applied.
Instruct users to avoid opening untrusted links delivered via email, messaging, or social media on Android devices.
Where feasible, use alternative browsers that are not affected while the Chrome update is pending, keeping in mind other Chromium-based Android browsers may share the flaw.

bash

# Verify installed Chrome version on Android via adb
adb shell dumpsys package com.android.chrome | grep versionName

# Expected patched output example:
# versionName=150.0.7871.47