---
id: "CVE-2026-121057"
kind: "vulnerability"
aliases: ["CVE-2026-121057"]
title: "Chrome: V8 type confusion lets a crafted web page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop", "other", "v8"]
not_affected_if: ["chrome-at-or-above-157.0.8103.38"]
published_at: "2026-11-03T21:17:10+00:00"
first_seen_at: "2026-11-03T21:19:10+00:00"
updated_at: "2026-11-03T21:27:10+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121057", "first_seen_at": "2026-11-03T21:19:10+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 157.0.8103.38, lets a remote attacker run arbitrary code inside the browser sandbox via a crafted HTML page. Chromium rates it High severity.

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

## How to check

- Open Chrome's About page (chrome://settings/help) and read the installed version
- Compare it with `157.0.8103.38`; anything older is in range

## Fix

- Google Chrome: move to `157.0.8103.38` or later

## Timeline

- 2026-11-03T21:19:10+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121057

## 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: High)

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