External risk intelligence

Chrome for Android WebGL Sandbox Escape Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-17726

This vulnerability exists in the WebGL component of a client-side web browser. While it requires a remote attacker to provide a crafted web page, the vulnerability is triggered by a user navigating to that content within the browser application. It is not an internet-facing service, gateway, or appliance that is reachable or exploitable without active user-side interaction with client software.

Integer Overflow

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 security issue in Google Chrome on Android allows a remote attacker to potentially escape the browser's security sandbox by tricking a user into visiting a malicious webpage. This could lead to unauthorized access to sensitive information or system functions.

A web browser flaw could let attackers break out of a sandbox.
Leadership should remember this for potential user-impacting risks.
Confirm relevance and assess potential exposure to affected users.

Attack Path

How an attacker could exploit the issue

An attacker could trick a user into visiting a malicious webpage, which then leverages an integer overflow in the browser's WebGL component. This vulnerability, if triggered, could allow the attacker to break out of the browser's security sandbox.

No authentication or privileges needed.
Triggered by visiting a crafted HTML page.
Allows sandbox escape.

Live Threat

Current exploitation, exposure, and threat context

A sandbox escape vulnerability in Google Chrome's WebGL component on Android could allow a remote attacker to gain elevated privileges. This could occur when a user visits a malicious HTML page, potentially impacting the security and integrity of the user's device and data.

User device and data assets at risk.
Via crafted HTML page, user interaction.
Potential sandbox escape and elevated privileges.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in Google Chrome's WebGL component on Android requires a user to visit a malicious webpage to be exploited. Ownership likely falls to the platform or mobile device management team, with the first practical step being to confirm the reachability and business criticality of affected devices and then coordinate with the vendor for mitigation.

Platform/MDM teams own the issue.
Verify Chrome version and user impact.
Plan vendor-coordinated updates.

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 on Android?

Google Chrome for Android is the mobile version of the widely used web browser, built on the Chromium engine. It includes a WebGL component, which is a JavaScript API designed for rendering interactive 2D and 3D graphics within the browser. This component handles complex mathematical tasks to display visuals, making it a critical part of how the browser processes web-based media.

What does CVE-2026-17726 mean?

This CVE refers to an integer overflow vulnerability in the browser's WebGL component, categorized under CWE-190. An integer overflow happens when software tries to store a number larger than the capacity of the memory assigned to it, causing the calculation to wrap around or fail. In this specific case, that error allows an attacker to bypass the browser's sandbox, which is the security boundary designed to keep malicious web content isolated from the rest of your mobile device.

How is this vulnerability triggered?

The flaw is triggered when a user visits a specially crafted HTML page designed to exploit the WebGL integer overflow. It is important to note that the vulnerability does not trigger automatically; the browser must process the malicious page during a user-initiated navigation event. Merely having the browser installed is not enough to cause the issue without that specific interaction with malicious content.

Is this vulnerability internet-facing?

According to Halo Surface Signal, this vulnerability is not an internet-facing service or appliance. Because it resides in client-side software, it requires an attacker to convince a user to navigate to malicious content. While the potential impact is significant, the threat depends entirely on user behavior rather than an exposed network port that can be reached directly by an attacker scanning the internet.

How should I respond to CVE-2026-17726?

The first step is to identify if your organization manages Android devices running versions of Chrome earlier than 151.0.7922.72. Since this is a client-side browser issue, confirm your fleet's current software versions and coordinate with the team responsible for mobile device management to prioritize the vendor-provided security updates that resolve this specific defect.

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.