External risk intelligence

Google Chrome Mojo Local Code Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-110144

The vulnerability requires a local attacker to execute a local program on the host machine to exploit the issue. It is a client-side sandbox escape condition that is not reachable via remote network requests or public internet exposure.

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 CVE involves an authorization flaw in Google Chrome, specifically within the Mojo component, that could allow a local attacker to execute code outside the browser's security sandbox. While the severity is high, the primary concern is confirming its relevance and exposure within our environment given the local execution requirement.

  • Flaw lets local programs break out of Chrome's sandbox.
  • Matters if any local programs could trigger this.
  • Confirm if this affects our systems; focus on local access.

Attack Path

How an attacker could exploit the issue

An attacker could leverage a local program to exploit a vulnerability in Mojo, a component within Google Chrome on Windows. This exploit would allow code execution beyond the browser's sandbox, potentially leading to broader system compromise.

  • Local program execution required.
  • Vulnerable Mojo component triggered.
  • Arbitrary code execution outside sandbox.

Live Threat

Current exploitation, exposure, and threat context

A local attacker with the ability to run a program on the affected system could potentially execute arbitrary code outside the browser's sandbox, impacting the system's integrity.

  • System data could be at risk.
  • Local program execution could lead to exposure.
  • Arbitrary code execution outside the sandbox.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in Google Chrome on Windows requires a local attacker to execute a local program to exploit. The first practical step is to identify all instances of the affected Chrome version, confirm their reachability and business criticality, and then assign ownership for remediation.

  • Own by Chrome and Windows administrators.
  • Verify local program execution context.
  • Plan phased updates during maintenance.

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 the Mojo component in Google Chrome?

Mojo is a collection of runtime libraries used by the Chromium project to enable inter-process communication. It allows different parts of the browser, such as the rendering engine and the core application, to talk to each other securely. By managing these service interfaces, Mojo helps enforce the browser's sandbox, which isolates web content from the underlying Windows operating system.

What does incorrect authorization mean for CVE-2026-110144?

This vulnerability, classified as CWE-863, means the software fails to properly verify if a user or program has the right to perform a specific action. In the context of CVE-2026-110144, the Mojo component does not sufficiently validate requests, allowing an unauthorized local program to bypass security checks and execute code beyond the boundaries of the Chrome sandbox.

How does an attacker trigger this vulnerability?

Exploitation requires an attacker to already have a local program running on the same machine as the affected version of Google Chrome. The vulnerability is not triggered by simply browsing to a malicious website or receiving a network request. It requires a specific, local interaction between a malicious application and the browser's Mojo interface to escape the sandbox.

Is my system at risk if Chrome is only used for internet browsing?

According to Halo Surface Signal, this vulnerability is very unlikely to be reached via remote network requests or general public internet exposure. Because it requires local execution on the host machine, the primary concern is not internet traffic, but rather whether untrusted or unauthorized programs are capable of running on your local systems.

What steps should I take to address this issue?

Begin by identifying all Windows machines in your environment running the affected versions of Google Chrome. Once located, coordinate with your system administrators to schedule browser updates as part of your standard maintenance. Prioritize systems where users may run third-party software that could potentially interact with browser processes.

References