---
id: "CVE-2026-118355"
kind: "vulnerability"
aliases: ["CVE-2026-118355"]
title: "Google Chrome: crafted HTML page can escape the sandbox and run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop", "managed-fleets", "other"]
not_affected_if: ["already-updated"]
published_at: "2026-10-27T23:17:04+00:00"
first_seen_at: "2026-10-27T23:29:44+00:00"
updated_at: "2026-10-27T23:31:27+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118355", "first_seen_at": "2026-10-27T23:29:44+00:00"}]
---

# Google Chrome: crafted HTML page can escape the sandbox and run code

Chrome prior to 156.0.8078.73 mishandles input in a Command component, so a crafted HTML page may run arbitrary code outside the browser sandbox. Chromium rates it High severity.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Chrome version in the browser's About page or with `google-chrome --version`
- Compare it against the fixed version `156.0.8078.73`

## Fix

- Update Google Chrome to `156.0.8078.73` or later

## Timeline

- 2026-10-27T23:29:44+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118355

## From the sources

Improper input validation in Command in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_