External risk intelligence

Google Chrome Sandbox Escape Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-110916

The vulnerability exists within a web browser, which is a client-side application designed to render internet-hosted content. Because the attack vector requires a user to navigate to a crafted HTML page, the surface is inherently exposed to the public internet during normal browsing activities.

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability in Google Chrome allows remote attackers to execute code outside the browser's secure sandbox by tricking users into visiting a malicious website. While the technical details involve improper input validation, the high-level risk is that a compromised browser could potentially lead to broader system access. The main concern is confirming relevance and exposure to this specific issue.

  • Attackers can run unauthorized code via malicious websites.
  • It affects a widely used application with broad internet exposure.
  • Confirm relevance and any potential exposure to this threat.

Attack Path

How an attacker could exploit the issue

An attacker could trick a user into visiting a malicious web page, which would then interact with a vulnerable part of Google Chrome's desktop application. This interaction could allow the attacker to execute code, potentially impacting the user's computer.

  • Requires user to visit a malicious page.
  • Triggered by a crafted HTML page.
  • Risk of arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, a remote attacker could potentially execute arbitrary code outside the sandbox by tricking a user into visiting a crafted HTML page. This could affect the user's system data and sensitive information.

  • User system data at risk.
  • Via a crafted HTML page.
  • Arbitrary code execution outside sandbox.

Operational Fix

Recommended remediation, mitigation, and detection steps

Desktop Chrome's Improper Input Validation vulnerability requires immediate attention from teams managing user endpoints and application security. The primary action is to determine the extent of exposure by identifying all Chrome installations, confirming if they are business-critical, and locating the accountable owners. Planning for remediation should then be prioritized based on this risk assessment.

  • Ownership: Endpoint and Application Security teams.
  • Verify first: Chrome installation count and exposure.
  • Action: Prioritize remediation based on risk.

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 in the context of this vulnerability?

Google Chrome is a widely used desktop web browser that retrieves and renders content from the internet. It uses a sandbox, which is a core security architecture designed to isolate web-based code from the underlying operating system. This vulnerability involves a weakness within the browser's desktop application handling of web data.

What does improper input validation mean for CVE-2026-110916?

This vulnerability is classified as CWE-20, Improper Input Validation. In plain terms, the browser fails to properly verify or sanitize data sent from a webpage before processing it. Because of this flaw, a crafted HTML page can trick the browser into executing unintended commands that escape the protective sandbox boundary.

How does an attacker trigger this vulnerability?

An attacker triggers this by enticing a user to navigate to a specifically crafted, malicious HTML page. The vulnerability is not triggered by simply having the browser installed or running; it requires the active rendering of this malicious web content. Normal, non-malicious browsing does not activate the bug.

Is my system at risk if I use Chrome for general browsing?

Yes, because web browsers are designed to fetch internet content, they are naturally exposed. Halo Surface Signal identifies this as a likely surface for concern because the attack vector is network-based and relies on common user interaction. If your users frequently access external sites, the risk of encountering a crafted page is higher.

What steps should I take if I use this software?

You should prioritize updating your Chrome desktop installations to version 155.0.8059.84 or later. First, identify all systems where Chrome is installed to understand your footprint. Once mapped, ensure these browsers are updated to the secure version provided by Google to resolve the input validation flaw.

References