---
id: "CVE-2026-118347"
kind: "vulnerability"
aliases: ["CVE-2026-118347"]
title: "Chrome: use-after-free in FileSystem lets a web page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop", "endpoints", "runtime"]
not_affected_if: ["chrome-up-to-date"]
published_at: "2026-10-27T23:17:03+00:00"
first_seen_at: "2026-10-27T23:29:44+00:00"
updated_at: "2026-10-27T23:31:34+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118347", "first_seen_at": "2026-10-27T23:29:44+00:00"}]
---

# Chrome: use-after-free in FileSystem lets a web page run code

A use-after-free bug in the FileSystem component of Google Chrome before 156.0.8078.73 lets a remote attacker run arbitrary code inside the browser sandbox. The attack is triggered by a crafted HTML page the user opens.

_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.
- Confirm whether the version is below `156.0.8078.73`.

## Fix

- Update Google Chrome to `156.0.8078.73` or later.
- Relaunch the browser after the update so the fix takes effect.

## Timeline

- 2026-10-27T23:29:44+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118347

## From the sources

Use after free in FileSystem in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to 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_