---
id: "CVE-2026-118342"
kind: "vulnerability"
aliases: ["CVE-2026-118342"]
title: "Google Chrome: out-of-bounds write in Editing lets a web page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["browsers", "chrome", "endpoints", "other"]
not_affected_if: ["already-on-156.0.8078.73-or-later"]
published_at: "2026-10-27T23:17:03+00:00"
first_seen_at: "2026-10-27T23:29:43+00:00"
updated_at: "2026-10-27T23:31:41+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118342", "first_seen_at": "2026-10-27T23:29:43+00:00"}]
---

# Google Chrome: out-of-bounds write in Editing lets a web page run code

Chrome versions before 156.0.8078.73 have an out-of-bounds write in the Editing component. A remote attacker who gets a user to open a crafted HTML page could execute arbitrary code outside the browser sandbox.

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

## How to check

- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux.
- Check the version reported by managed Chrome installs against `156.0.8078.73`.

## Fix

- Update Google Chrome to `156.0.8078.73` or later.
- Relaunch the browser after the update to load the fixed build.

## Timeline

- 2026-10-27T23:29:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118342

## From the sources

Out of bounds write in Editing 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_