---
id: "CVE-2026-121218"
kind: "vulnerability"
aliases: ["CVE-2026-121218"]
title: "Chrome: V8 type confusion lets a crafted web page run code"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["android", "browser", "chrome", "desktop", "package", "v8"]
not_affected_if: ["auto-updated-browser", "chrome-158-or-later"]
published_at: "2026-11-03T21:17:31+00:00"
first_seen_at: "2026-11-03T21:19:27+00:00"
updated_at: "2026-11-03T21:22:33+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121218", "first_seen_at": "2026-11-03T21:19:27+00:00"}]
---

# Chrome: V8 type confusion lets a crafted web page run code

A type confusion bug in the V8 JavaScript engine of Google Chrome, before version 157.0.8103.38, lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates it Medium severity.

_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 `chrome --version` on the command line.
- Confirm the installed version is `157.0.8103.38` or later.

## Fix

- Google Chrome: move to `157.0.8103.38` or later.

## Timeline

- 2026-11-03T21:19:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121218

## From the sources

Type confusion in V8 in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

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