External risk intelligence

Chrome ANGLE Sandbox Escape Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-11043

This vulnerability exists within the renderer process of a web browser and requires a user to navigate to a crafted HTML page to be triggered. As a client-side application component, it is not a network-facing service, gateway, or externally reachable management surface.

Out-of-bounds Write

Google Chrome

before 149.0.7827.53

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

An out-of-bounds write vulnerability in ANGLE, a graphics engine used by Google Chrome on macOS, could allow a remote attacker to escape the browser's sandbox. This could lead to broader system compromise if a user visits a malicious webpage. The Chromium security team has rated this as a Medium severity issue.

A browser flaw allows attackers to break out of security limits.
Matters because it could compromise user systems.
Confirm relevance and exposure within your environment.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by tricking a user into visiting a malicious website. If successful, this could allow them to escape the browser's sandbox and potentially gain broader access to the user's system.

Requires user interaction with a crafted page.
Vulnerable component within browser's renderer.
Potential for sandbox escape.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, a remote attacker who has already compromised the renderer process could potentially escape the sandbox by navigating a user to a specifically crafted HTML page. This could affect the behavior of the browser service and sensitive information handled by it.

Browser sandbox escape.
Crafted HTML page opened by user.
Potential system compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

Determining ownership for this out-of-bounds write vulnerability in ANGLE requires understanding where Google Chrome is deployed and managed. Typically, application owners, platform teams, or even vendor management teams would be accountable, depending on how Chrome is provisioned and supported within the organization. The initial practical step is to identify all Chrome installations, assess their reachability and criticality, and then locate the responsible owner to plan remediation.

Application owners should manage the issue.
Verify Chrome deployment scope and reachability.
Plan remediation considering business impact.

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 ANGLE component in Google Chrome?

ANGLE is a graphics engine library integrated into Google Chrome. Its primary purpose is to translate graphics API calls, like those used for web-based games or 3D visualizations, into formats that the underlying operating system—in this case, macOS—can process effectively. It acts as a bridge, ensuring that browser-based graphics content runs smoothly and consistently across different hardware and software environments.

What does an out-of-bounds write mean for CVE-2026-11043?

This vulnerability, classified as CWE-787, occurs when the software writes data past the end or before the beginning of the intended memory buffer. In the context of this CVE, this memory error allows a malicious actor to corrupt data or potentially execute unintended code, creating a pathway to bypass the security restrictions of the browser's sandbox.

How is this Chrome vulnerability triggered?

An attacker must trick a user into visiting a specifically crafted HTML page. The vulnerability is not triggered by simply having the browser open or by network activity alone; it requires the renderer process to be compromised through user interaction with malicious content. Simply browsing legitimate, non-malicious websites does not initiate the flaw.

Why does Halo Surface Signal label this as very unlikely to be exposed?

Halo Surface Signal assesses this as unlikely because the flaw resides within the browser's client-side renderer process, not in an externally reachable service, gateway, or management interface. Because it requires active user navigation to a malicious page to function, it does not present the same risk profile as an internet-facing server that is constantly listening for inbound connections.

What should I do if I am running Google Chrome on macOS?

Your first step is to verify the version of Google Chrome installed on your systems. If your version is older than 149.0.7827.53, you are running an affected build. Coordinate with your IT or desktop management team to ensure Chrome is updated to the latest stable release provided by Google, as this is the primary method to apply the necessary security fixes for this component.

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.