CVE-2026-14027: Google Chrome Use After Free Vulnerability

CVE-2026-14027 Overview

CVE-2026-14027 is a use-after-free vulnerability [CWE-416] in the SignIn component of Google Chrome versions prior to 150.0.7871.47. A remote attacker can trigger heap corruption by convincing a user to perform specific UI gestures on a crafted HTML page. Successful exploitation can lead to arbitrary code execution within the browser process. Chromium rates the security severity as Low, while the assigned CVSS 3.1 base score places it in the high range due to network attack vector and high impact on confidentiality, integrity, and availability.

Critical Impact
Remote attackers can trigger heap corruption in the Chrome SignIn component through a crafted HTML page, potentially resulting in arbitrary code execution after user interaction.

Affected Products

Google Chrome Desktop versions prior to 150.0.7871.47
All operating system builds distributed through the Chrome Stable channel
Chromium-based browsers that inherit the vulnerable SignIn component code

Discovery Timeline

2026-06-30 - CVE-2026-14027 published to the National Vulnerability Database
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-14027

Vulnerability Analysis

The flaw resides in Chrome's SignIn component, which handles account authentication workflows within the browser. A use-after-free condition occurs when the component references heap memory that has already been freed. An attacker who lures a user to a malicious page and induces specific UI interactions can force the browser to dereference the dangling pointer. This dereference corrupts heap metadata and enables an attacker to influence subsequent memory allocations. From that position, an adversary can pivot toward arbitrary code execution within the renderer or browser process context, subject to sandbox constraints.

Root Cause

The root cause is improper lifetime management of an object used by the SignIn subsystem. The code retains a reference to a heap-allocated object after that object has been released. When the UI gesture triggers a code path that dereferences the stale pointer, the freed memory may already contain attacker-influenced data, satisfying the classic conditions for use-after-free exploitation described in [CWE-416].

Attack Vector

Exploitation requires the victim to visit a crafted HTML page and complete specific UI gestures, such as clicks or form interactions tied to the SignIn workflow. No authentication or elevated privileges are required on the attacker side. Because delivery occurs over the network through standard web navigation, phishing, malvertising, and watering-hole techniques are viable distribution channels. Technical details are tracked in the Chromium Issue Tracker Entry and the Google Chrome Desktop Update advisory.

Detection Methods for CVE-2026-14027

Indicators of Compromise

Chrome renderer or browser process crashes with heap corruption signatures following navigation to an untrusted page
Unexpected child process creation from chrome.exe shortly after user interaction with a web page
Outbound connections from Chrome to newly registered or low-reputation domains hosting SignIn-themed content

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any endpoint running a build earlier than 150.0.7871.47
Correlate browser crash telemetry with recent URL history to identify pages that trigger repeated SignIn component faults
Monitor for post-exploitation behaviors such as script interpreter spawns, credential access, or persistence attempts originating from Chrome

Monitoring Recommendations

Ingest Chrome crash reports and endpoint process telemetry into a central analytics platform for correlation
Alert on Chrome processes writing executables or scripts to user-writable directories
Track browser update compliance as a continuous control rather than a point-in-time check

How to Mitigate CVE-2026-14027

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all managed endpoints
Restart the browser after updating to ensure the patched binaries are loaded into memory
Verify that enterprise Chrome update policies are enforcing automatic updates and not deferring the Stable channel

Patch Information

Google addressed CVE-2026-14027 in the Chrome Stable channel release 150.0.7871.47. Administrators should consult the Google Chrome Desktop Update release notes and validate deployment through Chrome Enterprise policies or endpoint management tooling.

Workarounds

Restrict browsing to trusted domains through web filtering until patch deployment completes
Disable or restrict the SignIn workflow via Chrome Enterprise policies where operationally feasible
Educate users to avoid unsolicited authentication prompts and unfamiliar sign-in pages

bash

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

# Windows: query installed version via registry
reg query "HKLM\Software\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv