CVE-2026-13888: Google Chrome Use-After-Free Vulnerability

CVE-2026-13888 Overview

CVE-2026-13888 is a use-after-free vulnerability [CWE-416] in the Extensions component of Google Chrome versions prior to 150.0.7871.47. A remote attacker can exploit the flaw by serving a crafted HTML page, allowing arbitrary code execution inside the Chrome sandbox. Successful exploitation requires user interaction, such as visiting a malicious page. Google tracks the Chromium security severity as Medium, while the NVD assigns a CVSS score of 8.8. The vulnerability affects Chrome on Windows, macOS, and Linux platforms.

Critical Impact
A remote attacker can achieve arbitrary code execution inside the Chrome sandbox by luring a user to a crafted HTML page.

Affected Products

Google Chrome prior to 150.0.7871.47
Microsoft Windows (Chrome desktop)
Apple macOS and Linux (Chrome desktop)

Discovery Timeline

2026-06-30 - CVE-2026-13888 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-13888

Vulnerability Analysis

The vulnerability resides in the Extensions subsystem of Chrome, which manages the lifecycle of extension objects, message pipes, and associated renderer state. A use-after-free condition occurs when Chrome frees an object referenced by the Extensions component while another code path still holds a dangling pointer to that memory. Subsequent access to the freed region enables an attacker to influence memory contents and control execution flow.

The issue is reachable from web content because extension APIs and events are exposed to renderer processes. An attacker hosts a crafted HTML page that triggers a specific sequence of extension-related operations, releasing an object while other references remain live. This primitive can be shaped into read/write access and, ultimately, arbitrary code execution within the sandboxed renderer context.

Exploitation requires user interaction (UI:R) but no privileges. The scope is unchanged, meaning code runs inside the sandbox rather than escaping it. Combined with a separate sandbox escape, this flaw could contribute to a full browser compromise chain. The current EPSS probability is 0.351%, placing it in the 27th percentile.

Root Cause

The root cause is improper object lifetime management within the Extensions component. Reference tracking fails to keep an allocation alive across an asynchronous or reentrant operation, resulting in the classic use-after-free pattern described by CWE-416.

Attack Vector

The attack vector is network-based. An attacker delivers a crafted HTML page through a website, advertisement, or embedded frame. When a user with a vulnerable Chrome build loads the page, the malicious JavaScript triggers the vulnerable code path in Extensions and executes attacker-controlled code inside the sandbox. See the Chromium Issue Tracker Entry for additional technical context.

Detection Methods for CVE-2026-13888

Indicators of Compromise

Chrome renderer processes crashing repeatedly with heap corruption signatures shortly after visiting a specific URL.
Unexpected child processes spawned by chrome.exe, Google Chrome Helper, or Linux Chrome renderer binaries.
Outbound network connections from Chrome renderer processes to unfamiliar hosts following page loads.

Detection Strategies

Inventory Chrome versions across managed endpoints and flag any build below 150.0.7871.47.
Correlate browser crash telemetry with recent navigation events to identify pages triggering renderer faults.
Hunt for post-exploitation behaviors such as script interpreters, LOLBins, or credential access tools launched from Chrome process trees.

Monitoring Recommendations

Enable enterprise Chrome reporting to centralize crash, extension, and update events.
Monitor DNS and proxy logs for user visits to newly registered or low-reputation domains preceding renderer crashes.
Track extension installation and update events for anomalous changes across the fleet.

How to Mitigate CVE-2026-13888

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on Windows, macOS, and Linux endpoints.
Force-restart Chrome after deployment to ensure the patched binary is loaded on all sessions.
Verify managed browser policies allow automatic updates and block downgrade to vulnerable builds.

Patch Information

Google addressed the vulnerability in the Chrome Stable channel release documented in the Google Chrome Release Update. Administrators should confirm rollout through enterprise update management and validate installed versions across the environment.

Workarounds

Restrict browsing to trusted sites via web filtering until patched builds are fully deployed.
Disable or restrict third-party extensions through enterprise policy to reduce attack surface in the Extensions component.
Apply Site Isolation and enhanced Safe Browsing policies via Chrome Enterprise configuration.

bash

# Verify installed Chrome version on Linux/macOS
google-chrome --version

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

# Chrome Enterprise policy: enforce automatic updates and minimum version (Linux example)
cat > /etc/opt/chrome/policies/managed/chrome-update.json <<'EOF'
{
  "DefaultBrowserSettingEnabled": true,
  "ComponentUpdatesEnabled": true,
  "TargetVersionPrefix": "150.0.7871.47"
}
EOF