---
id: "CVE-2026-121035"
kind: "vulnerability"
aliases: ["CVE-2026-121035"]
title: "Chrome: use-after-free in Prerender lets a web page run code"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browsers", "chrome", "endpoints", "package"]
not_affected_if: ["already-updated"]
published_at: "2026-11-03T21:17:06+00:00"
first_seen_at: "2026-11-03T21:19:09+00:00"
updated_at: "2026-11-03T21:27:33+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121035", "first_seen_at": "2026-11-03T21:19:09+00:00"}]
---

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

A use-after-free bug in the Prerender feature of Google Chrome lets a crafted HTML page make the browser run attacker code outside its sandbox. The Chromium security team rates it Critical.

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

## How to check

- Open Chrome, go to `chrome://settings/help`, and read the installed version
- Check that the version is below `157.0.8103.38`, which means the browser is exposed

## Fix

- Google Chrome: `157.0.8103.38` or later

## Timeline

- 2026-11-03T21:19:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121035

## From the sources

Use after free in Prerender in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

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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_