---
id: "CVE-2026-118346"
kind: "vulnerability"
aliases: ["CVE-2026-118346"]
title: "Chrome: use-after-free in compositing lets a crafted page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop", "managed-fleet", "other"]
not_affected_if: ["already-updated-to-156.0.8078.73"]
published_at: "2026-10-27T23:17:03+00:00"
first_seen_at: "2026-10-27T23:29:43+00:00"
updated_at: "2026-10-27T23:31:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118346", "first_seen_at": "2026-10-27T23:29:43+00:00"}]
---

# Chrome: use-after-free in compositing lets a crafted page run code

Google Chrome before 156.0.8078.73 has a use-after-free bug in its Compositing component. A remote attacker who lures a user to a crafted HTML page can potentially execute arbitrary code inside the browser sandbox.

_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` (unknown for managed or other platforms)
- Confirm whether any managed fleet reports Chrome below `156.0.8078.73`

## Fix

- Update Google Chrome to `156.0.8078.73` or later
- Restart the browser after the update so the fixed version is running

## Timeline

- 2026-10-27T23:29:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118346

## From the sources

Use after free in Compositing in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside 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_