CVE-2026-14399: Google Chrome Dawn Information Disclosure

CVE-2026-14399 Overview

CVE-2026-14399 is an uninitialized memory use vulnerability in the Dawn component of Google Chrome. Dawn is Chrome's cross-platform implementation of the WebGPU standard. Versions of Chrome prior to 150.0.7871.46 are affected. A remote attacker can exploit this flaw by convincing a user to visit a crafted HTML page. Successful exploitation allows the attacker to obtain potentially sensitive information from browser process memory. Google rated the Chromium security severity as Medium. The issue is tracked under [CWE-457: Use of Uninitialized Variable].

Critical Impact
Remote attackers can leak sensitive data from Chrome process memory through a malicious web page rendered by the Dawn WebGPU implementation.

Affected Products

Google Chrome versions prior to 150.0.7871.46
Chromium-based browsers using the vulnerable Dawn WebGPU implementation
Desktop platforms shipping the affected Chrome stable channel build

Discovery Timeline

2026-07-01 - CVE-2026-14399 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-14399

Vulnerability Analysis

The vulnerability resides in Dawn, the WebGPU implementation used by Chrome to expose GPU functionality to web content. Dawn translates WebGPU API calls into native graphics backends such as Vulkan, Metal, D3D12, and OpenGL. The flaw involves the use of an uninitialized variable or memory region during this processing. When exploited, the browser reads memory that was never explicitly initialized. That memory can retain residual data from prior allocations, including pointers, tokens, or other artifacts from the renderer process. Because WebGPU is reachable from ordinary JavaScript, an attacker can trigger the vulnerable code path from a web page without any elevated privileges. The attack requires user interaction, meaning the target must load or interact with the malicious page.

Root Cause

The root cause is classified as [CWE-457: Use of Uninitialized Variable]. A code path inside Dawn accesses a variable or buffer before it has been assigned a defined value. The contents therefore reflect whatever data previously occupied that memory. When those contents are surfaced back to WebGPU callers or copied into readable resources, the attacker gains a window into process memory. This class of defect commonly arises when new fields are added to structures, when error paths skip initialization, or when buffers are reused across draw calls.

Attack Vector

The attack vector is network-based and requires user interaction. The attacker hosts a crafted HTML page that issues WebGPU calls designed to trigger the Dawn code path containing the uninitialized read. The victim only needs to visit the page in a vulnerable Chrome build. The vulnerability impacts confidentiality by disclosing process memory contents. Integrity and availability are not directly impacted. See the Chromium Issue Tracker Entry for additional context.

No verified proof-of-concept code has been published for CVE-2026-14399.
Refer to the Chromium issue tracker for technical details once access
restrictions are lifted by the Chrome security team.

Detection Methods for CVE-2026-14399

Indicators of Compromise

Chrome browser processes running builds earlier than 150.0.7871.46 on endpoints that visit untrusted sites.
Outbound connections from browser processes to newly registered or low-reputation domains delivering WebGPU-heavy content.
HTML pages that invoke navigator.gpu APIs from unexpected third-party contexts.

Detection Strategies

Inventory installed Chrome versions across managed endpoints and flag any build below 150.0.7871.46.
Correlate browser telemetry with web proxy logs to identify sessions where WebGPU content loads from untrusted origins.
Monitor for unexpected renderer process behavior such as anomalous memory reads or crash signatures tied to Dawn.

Monitoring Recommendations

Ingest browser version data into the SIEM or asset inventory and alert on stale Chrome installations.
Track EPSS movement for CVE-2026-14399 to detect any increase in exploitation likelihood.
Review Google's Chrome Releases blog for related follow-up fixes.

How to Mitigate CVE-2026-14399

Immediate Actions Required

Update Google Chrome to version 150.0.7871.46 or later on all managed endpoints.
Force a browser restart after deploying the update so the patched Dawn binaries are loaded.
Verify that Chromium-based browsers and embedded WebViews in the environment consume the fixed Dawn version.

Patch Information

Google addressed CVE-2026-14399 in the Chrome stable channel release documented in the Google Chrome Update Announcement. The fix ships in Chrome 150.0.7871.46 and later. Downstream Chromium-based browsers should be updated once vendors incorporate the corresponding Dawn changes.

Workarounds

Disable WebGPU via the chrome://flags/#enable-unsafe-webgpu and related feature flags where business requirements permit.
Restrict access to untrusted web content through enterprise browsing policies or web filtering until patches are deployed.
Apply enterprise policy to enforce automatic Chrome updates so future Dawn fixes are delivered without user action.

bash

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

# Windows: query the installed version from the registry
reg query "HKLM\SOFTWARE\Google\Chrome\BLBeacon" /v version