External risk intelligence

Chrome Sandbox Escape Vulnerability Allows Remote Code Execution

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-17692

This vulnerability affects the browser renderer process and requires a user to navigate to a crafted HTML page. It is a client-side issue rather than a service, appliance, or network-accessible endpoint that would be exposed to the public internet by design.

Use After Free

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

A recent vulnerability in Google Chrome's DataTransfer component could allow attackers to escape the browser's security sandbox. This flaw, if exploited, might enable unauthorized access to user systems through malicious web pages. The main concern is confirming if this specific vulnerability is relevant to our environment.

Use after free in Chrome's data transfer.
Sandbox escape could affect user data.
Confirm relevance and exposure.

Attack Path

How an attacker could exploit the issue

A remote attacker with initial renderer process compromise could trick a user into visiting a malicious webpage. This webpage would exploit a use-after-free flaw in Chrome's DataTransfer component, potentially allowing the attacker to escape the browser's sandbox.

Entry condition: Compromised renderer process.
Trigger point: Visiting a malicious HTML page.
Resulting risk: Sandbox escape.

Live Threat

Current exploitation, exposure, and threat context

A use-after-free vulnerability in Google Chrome's DataTransfer component could allow a remote attacker to escape the browser's sandbox. This could occur when a user visits a maliciously crafted HTML page. If an attacker has already compromised the renderer process, they might then be able to achieve a sandbox escape.

Sandbox escape.
Malicious HTML page interaction.
Potential system compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in Google Chrome's DataTransfer component, allowing for potential sandbox escape, is primarily of concern to end-user computing and potentially platform teams managing browser deployments. The first practical step is to identify all systems running the affected Chrome version, confirm the business criticality of those systems, and determine the scope of exposure before planning remediation.

End-user computing and platform teams should own this.
Verify Chrome version and user exposure.
Plan controlled updates or user guidance.

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 the Google Chrome DataTransfer component?

The DataTransfer component is a fundamental part of the Chrome browser engine that manages how information moves between different elements within a webpage, such as drag-and-drop actions or copy-paste operations. It ensures that data remains secure and isolated while handling these tasks. In this context, it is the specific area of the browser's code where a memory management flaw exists, potentially impacting how the browser safely handles data during these interactions.

What does 'use after free' mean for CVE-2026-17692?

This vulnerability is classified as CWE-416, or 'use after free.' In simple terms, the browser continues to reference a piece of memory after it has been cleared or deleted. A clever attacker can manipulate this mistake to inject malicious data into that memory space before the browser realizes it should no longer be there. By doing so, they may trick the application into executing unauthorized code, which can be leveraged to escape the security protections meant to isolate the browser.

How is this sandbox escape triggered?

The attack requires a specific sequence: the attacker must first gain control over the browser's renderer process and then entice a user to visit a specially crafted HTML page. Simply having the browser open is not enough; the flaw is not triggered by background processes or automated network connections. It specifically requires active user interaction with malicious web content that exploits the compromised renderer to break out of the browser's security boundaries.

Do I need to worry about this if Chrome is internal?

Halo Surface Signal indicates that this is a client-side issue rather than a server-side vulnerability. Because it requires user interaction—specifically navigating to a malicious page—it is not exposed to the public internet in the same way a web server would be. Your risk level primarily depends on the habits of your users and their likelihood of visiting untrusted or compromised websites, rather than the internal or external network placement of the device.

What should I do first to address this Chrome vulnerability?

The most effective first step is to verify the versions of Chrome currently deployed across your organization. Once you have identified systems running older, vulnerable versions, prioritize updates for devices used by individuals who frequently browse external websites. Coordinate with your platform or IT team to ensure the latest stable version of Chrome is rolled out, as this removes the vulnerable code and closes the potential path for a sandbox escape.

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.