External risk intelligence

Chrome for Android WebGL Integer Overflow Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-106239

The vulnerability exists within the WebGL component of a web browser, requiring a user to visit a specifically crafted website. Because it is a client-side application vulnerability rather than a server-side service, public internet-facing infrastructure or gateway exposure is not involved.

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 vulnerability in Google Chrome's WebGL component on Android could allow attackers to execute code outside the browser's safe sandbox if a user visits a malicious webpage. The Chromium security team has rated this as a High severity issue.

  • An overflow flaw in browser code.
  • Matters for user browsing, code execution risk.
  • Confirm relevance and any exposure.

Attack Path

How an attacker could exploit the issue

An attacker could lure a user into visiting a malicious webpage. This webpage would contain specially crafted code designed to trigger an integer overflow vulnerability within the WebGL component of Google Chrome. If successful, this could allow the attacker to execute code, potentially impacting the user's device.

  • Entry condition: User visits a malicious webpage.
  • Trigger point: Crafted HTML page triggers WebGL overflow.
  • Resulting risk: Arbitrary code execution outside sandbox.

Live Threat

Current exploitation, exposure, and threat context

A remote attacker could execute arbitrary code outside the sandbox when a user visits a crafted HTML page in an affected browser.

  • Arbitrary code execution.
  • Crafted HTML page.
  • System compromise possible.

Operational Fix

Recommended remediation, mitigation, and detection steps

The critical integer overflow in Google Chrome's WebGL component on Android, prior to a specific version, presents a high risk of arbitrary code execution outside the sandbox. Responsibility likely falls to teams managing end-user device security and application deployments, including mobile device management (MDM) or endpoint security administrators, and potentially application owners who authorize browser usage. The immediate practical move is to identify all Android devices running affected Chrome versions, confirm reachability to malicious sites, and prioritize remediation for devices used in business-critical functions or by privileged users.

  • Own by endpoint security and application teams.
  • Verify user impact and critical business use.
  • Plan controlled browser or device updates.

Supplementary metadata

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.

Frequently asked questions

What is Google Chrome on Android?

It is a mobile web browser that provides users access to the internet. It includes a WebGL component, which allows the browser to render 2D and 3D graphics directly within a webpage by leveraging the device's hardware capabilities.

What does integer overflow mean in CVE-2026-106239?

This refers to a CWE-190 weakness, where a mathematical calculation exceeds the storage capacity of a memory buffer. In this specific vulnerability, the browser mismanages data during graphics processing, which can create a gap in its security architecture.

How does an attacker trigger this vulnerability?

The attack requires a user to navigate to a webpage containing malicious, specially crafted HTML code. Simply having the browser installed does not trigger the bug; the browser must actively process the harmful graphics instructions provided by that specific site.

Is my organization at risk from this Chrome vulnerability?

According to Halo Surface Signal, this is a client-side issue, not a server-side one. It does not affect internet-facing gateways or infrastructure. Risk depends on whether users access untrusted sites on Android devices within your environment.

What is the first step to secure devices against this flaw?

You should audit your device fleet to identify any Android hardware running Chrome versions older than 155.0.8059.39. Once identified, prioritize updating these browsers through your standard management channels to ensure the patch is applied.

References