External risk intelligence

Google Chrome USB Use-After-Free Sandbox Escape

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-13846

This vulnerability requires a user to navigate to a crafted HTML page to trigger a renderer process compromise. As a client-side browser issue, it is not an internet-facing service or appliance that is reachable by public network scans or deployed as an edge service; it operates within the context of a local client application.

Use After Free

Google Chrome

before 150.0.7871.47

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a high-severity vulnerability in Google Chrome's handling of USB interactions. The flaw could allow a remote attacker, through a malicious webpage, to escape the browser's security sandbox, potentially impacting user systems. The main concern is confirming whether this specific vulnerability is relevant to our deployed configurations and user activity.

Flaw allows sandboxed code to escape.
Confirms relevance and exposure for user systems.
Monitor usage and confirm if this affects us.

Attack Path

How an attacker could exploit the issue

An attacker could start by gaining control of the browser's renderer process. This would allow them to present a malicious HTML page to a user. If the user visits this page, the vulnerability in the USB component could be triggered, potentially leading to an escape from the browser's security sandbox.

Requires compromised renderer process.
Triggered by visiting a crafted HTML page.
Risk of sandbox escape.

Live Threat

Current exploitation, exposure, and threat context

A sandbox escape vulnerability in Chrome's USB handling could allow a remote attacker, who has already compromised the renderer process, to break out of the browser's sandbox. This could occur when a user visits a specially crafted HTML page, potentially affecting the user's system data.

System data could be affected.
Via crafted HTML page.
Sandbox escape to impact system.

Operational Fix

Recommended remediation, mitigation, and detection steps

The critical vulnerability in Google Chrome's USB component requires a coordinated response from teams managing end-user computing, application security, and potentially vendor management for Chrome updates. The immediate first step is to determine the scope of affected systems, prioritize critical or exposed environments, and identify the specific teams or individuals accountable for Chrome instances within your organization. Subsequent actions will depend on this inventory and risk assessment.

Identify affected Chrome instances and owners.
Verify user exposure and business criticality.
Plan risk-based remediation or vendor coordination.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Google Chrome and how does it use USB?

Google Chrome is a widely used web browser that renders web content. To enhance functionality, it includes components that allow websites to interact with hardware peripherals like USB devices. These features enable browser-based applications to communicate directly with connected hardware, such as specialized input devices or external storage, subject to browser security controls.

What does this use-after-free vulnerability mean?

This is a memory management flaw, specifically a Use-After-Free (CWE-416). It happens when software continues to use a memory location after it has been cleared or freed. In CVE-2026-13846, an attacker can manipulate this invalid memory state to break out of the browser's security sandbox, which is the protective boundary designed to keep malicious web content from accessing your actual computer system.

How is this Chrome vulnerability triggered?

Triggering this flaw requires a multi-step sequence. First, an attacker must successfully compromise the browser's renderer process. Then, a user must visit a specially crafted HTML page designed to exploit the USB component. Importantly, simply having a USB device plugged into your computer does not automatically trigger this bug; the interaction must occur through a malicious webpage.

Is my system at high risk for CVE-2026-13846?

Halo Surface Signal indicates this is unlikely to be a typical internet-facing service risk. Because this is a client-side browser issue rather than a reachable network service or appliance, the primary risk involves users navigating to malicious content. While it resides on endpoints, it is not something an attacker can reach directly from the public internet without a user first interacting with the crafted page.

What should I do if I manage Chrome instances?

Your priority is to identify all Chrome installations in your environment and determine which are running versions affected by this flaw. Once you have an inventory, coordinate with your teams to ensure these instances are updated to the secure version. This process is a standard part of managing end-user software and maintaining the integrity of the browser's security sandbox.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.