CVE-2026-17692: Google Chrome Use After Free Vulnerability

CVE-2026-17692 Overview

CVE-2026-17692 is a use-after-free vulnerability [CWE-416] in the DataTransfer component of Google Chrome on Windows. Versions prior to 151.0.7922.72 are affected. A remote attacker who has already compromised the renderer process can exploit this flaw to potentially escape the Chrome sandbox using a crafted HTML page. Google's Chromium security team rated the issue as High severity. The vulnerability requires prior renderer compromise, making it a second-stage exploit primitive typically chained with a separate renderer bug.

Critical Impact
Successful exploitation enables sandbox escape from a compromised renderer, allowing attackers to break out of Chrome's security boundary and execute code with browser process privileges on Windows hosts.

Affected Products

Google Chrome on Windows prior to version 151.0.7922.72
Chromium-based browsers built on affected upstream versions
Downstream distributions incorporating vulnerable Chromium DataTransfer code

Discovery Timeline

2026-07-30 - CVE-2026-17692 published to NVD
2026-07-30 - Last updated in NVD database

Technical Details for CVE-2026-17692

Vulnerability Analysis

The flaw resides in Chrome's DataTransfer implementation, which manages clipboard and drag-and-drop data exchange between web content and the browser. A use-after-free condition occurs when the browser accesses memory associated with a DataTransfer object after it has been freed. The vulnerability requires a renderer process that is already under attacker control, so it functions as a sandbox escape primitive rather than an initial-access vector. Exploitation involves a crafted HTML page that manipulates DataTransfer object lifetimes to trigger the dangling reference.

Root Cause

The root cause is improper lifetime management of DataTransfer objects within the Blink rendering engine. Freed memory remains referenceable through stale pointers, and subsequent operations dereference these pointers. Attackers who groom the heap between the free and the reuse can place controlled data in the reclaimed allocation. This condition maps to CWE-416 (Use After Free), a memory corruption class commonly leveraged for arbitrary read/write primitives in browser exploitation.

Attack Vector

Exploitation follows a two-stage model. The attacker first compromises the renderer through a separate vulnerability, then delivers a crafted HTML page that triggers the DataTransfer use-after-free. Because the affected code path crosses the renderer-to-browser boundary, successful exploitation can escape the sandbox. Refer to the Chromium Issue Tracker Entry and the Google Chrome Stable Update for vendor details.

Detection Methods for CVE-2026-17692

Indicators of Compromise

Chrome renderer or browser process crashes referencing DataTransfer or clipboard-related stack frames
Unexpected child processes spawned by chrome.exe following visits to untrusted pages
Windows Error Reporting entries citing access violations in Chrome versions prior to 151.0.7922.72

Detection Strategies

Inventory installed Chrome versions across Windows endpoints and flag hosts below 151.0.7922.72
Monitor for anomalous process trees where chrome.exe browser process spawns unusual children or writes to sensitive paths
Correlate browser crash telemetry with subsequent suspicious network connections or persistence artifacts

Monitoring Recommendations

Ingest Chrome crash dumps and browser telemetry into your SIEM for centralized triage
Alert on renderer sandbox violations and unexpected token elevation from browser processes
Track outbound connections initiated by Chrome to newly observed or low-reputation domains hosting HTML payloads

How to Mitigate CVE-2026-17692

Immediate Actions Required

Update Google Chrome on Windows to version 151.0.7922.72 or later across all managed endpoints
Restart Chrome after the update to ensure the patched binary is loaded into memory
Validate deployment via enterprise policy or software inventory tools, and remediate hosts that report a lower version

Patch Information

Google released the fix in Chrome Stable 151.0.7922.72 for Windows. See the Google Chrome Stable Update release notes for the full changelog. Chromium-based browser vendors should incorporate the upstream patch referenced in the Chromium Issue Tracker Entry.

Workarounds

Enforce automatic Chrome updates through group policy or enterprise management to reduce patch lag
Restrict browsing to trusted sites via URL allow-listing on high-risk endpoints until patching completes
Enable site isolation and ensure the Chrome sandbox is not disabled by administrative configuration

bash

# Verify installed Chrome version on Windows endpoints
reg query "HKLM\SOFTWARE\Google\Chrome\BLBeacon" /v version
reg query "HKLM\SOFTWARE\WOW6432Node\Google\Chrome\BLBeacon" /v version

# Force update via Google Update policy (example)
reg add "HKLM\SOFTWARE\Policies\Google\Update" /v UpdateDefault /t REG_DWORD /d 1 /f