---
id: "CVE-2026-121036"
kind: "vulnerability"
aliases: ["CVE-2026-121036"]
title: "Chrome: use-after-free in CSS lets a crafted page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "mobile", "package"]
not_affected_if: ["chrome-updated"]
published_at: "2026-11-03T21:17:06+00:00"
first_seen_at: "2026-11-03T21:19:09+00:00"
updated_at: "2026-11-03T21:27:30+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121036", "first_seen_at": "2026-11-03T21:19:09+00:00"}]
---

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

A use-after-free bug in the CSS 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 the security severity High.

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

## How to check

- Open Chrome, go to Settings > About Chrome, and read the installed version.
- Check that the version is `157.0.8103.38` or later.

## Fix

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

## Timeline

- 2026-11-03T21:19:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121036

## From the sources

Use after free in CSS 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)

---

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