CVE-2026-17932: Google Chrome Use After Free Vulnerability

CVE-2026-17932 Overview

CVE-2026-17932 is a use-after-free vulnerability in the DataTransfer component of Google Chrome on Windows. The flaw affects Chrome versions prior to 151.0.7922.72. A local attacker can exploit the issue by delivering a crafted HTML page to a targeted user. Successful exploitation allows the attacker to obtain potentially sensitive information from process memory. Google's Chromium security team rated the internal severity as Low. The vulnerability is tracked under CWE-416: Use After Free.

Critical Impact
A crafted HTML page can trigger memory reuse in DataTransfer, exposing residual browser process memory to a local attacker.

Affected Products

Google Chrome for Windows versions prior to 151.0.7922.72
Chromium-based browsers on Windows that incorporate the vulnerable DataTransfer implementation
Environments where users can be induced to load attacker-controlled HTML content

Discovery Timeline

2026-07-30 - CVE-2026-17932 published to NVD
2026-07-30 - Last updated in NVD database
Stable channel fix delivered in the Google Chrome Desktop Update, tracked in Chromium Issue Tracker #513819157

Technical Details for CVE-2026-17932

Vulnerability Analysis

The vulnerability resides in Chrome's DataTransfer interface, which mediates clipboard and drag-and-drop content between web pages and the browser. A use-after-free condition occurs when the browser continues to reference a DataTransfer object or one of its backing buffers after the associated memory has been released. When the freed region is later reallocated with attacker-influenced content or lingers with stale data, subsequent reads leak bytes from process memory.

Because the disclosure is scoped to memory contents within the renderer or browser process, the practical impact is information disclosure rather than code execution. Leaked data may include page content from other origins, session artifacts, or address-space information usable to bypass mitigations such as Address Space Layout Randomization (ASLR) in follow-on attacks.

Root Cause

The root cause is improper object lifetime management in the DataTransfer code path [CWE-416]. A reference to a released allocation is dereferenced during subsequent DOM or clipboard operations, returning stale memory contents to JavaScript-accessible APIs on the crafted page.

Attack Vector

Exploitation requires a local user to load a crafted HTML page in a vulnerable Chrome build. The attacker uses standard DOM and DataTransfer-related APIs to reach the vulnerable state and read residual memory. No elevated privileges are required, and no additional software must be installed on the target host.

No public proof-of-concept code is available. See the Chromium Issue Tracker #513819157 for technical detail once the report is unrestricted.

Detection Methods for CVE-2026-17932

Indicators of Compromise

Chrome browser processes on Windows running versions earlier than 151.0.7922.72
User navigation to untrusted HTML pages that heavily exercise clipboard or drag-and-drop APIs
Renderer process crashes or unexpected terminations correlated with DataTransfer activity

Detection Strategies

Inventory installed Chrome versions across Windows endpoints and flag builds below 151.0.7922.72
Alert on browser child-process crashes referencing DataTransfer, clipboard, or drag-and-drop code paths in Windows Error Reporting (WER) telemetry
Correlate outbound web traffic to newly observed domains with subsequent anomalous browser process behavior

Monitoring Recommendations

Collect endpoint telemetry for Chrome process lineage, module loads, and crash events
Monitor patch compliance dashboards to confirm Chrome auto-update has applied the fixed build
Track browsing to low-reputation sites via web proxy or DNS logs and pivot on hosts still running vulnerable versions

How to Mitigate CVE-2026-17932

Immediate Actions Required

Update Google Chrome on Windows to version 151.0.7922.72 or later
Force a browser restart after update to ensure the patched binary is loaded across all Chrome processes
Verify that Chrome auto-update is enabled and not blocked by group policy or network filtering

Patch Information

Google addressed CVE-2026-17932 in the Chrome stable channel update announced in the Google Chrome Desktop Update. The fix is included in Chrome 151.0.7922.72 for Windows. Chromium-based browser vendors should incorporate the upstream fix referenced in Chromium Issue Tracker #513819157.

Workarounds

Restrict browsing to trusted sites via enterprise web filtering until patches are deployed
Enable Chrome's Site Isolation (--site-per-process) to limit cross-origin memory exposure
Disable or restrict clipboard and drag-and-drop APIs on high-risk hosts through enterprise browser policy

bash

# Verify installed Chrome version on Windows via PowerShell
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion

# Force Chrome update check
Start-Process "C:\Program Files (x86)\Google\Update\GoogleUpdate.exe" -ArgumentList "/ua /installsource scheduler"