---
id: "CVE-2026-121178"
kind: "vulnerability"
aliases: ["CVE-2026-121178"]
title: "Chrome: use-after-free in Aura lets a compromised renderer escape sandbox"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop", "package"]
not_affected_if: ["chrome-up-to-date"]
published_at: "2026-11-03T21:17:26+00:00"
first_seen_at: "2026-11-03T21:19:24+00:00"
updated_at: "2026-11-03T21:23:11+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121178", "first_seen_at": "2026-11-03T21:19:24+00:00"}]
---

# Chrome: use-after-free in Aura lets a compromised renderer escape sandbox

A use-after-free bug in Aura, Chrome's windowing layer, can be triggered from a crafted HTML page by an attacker who already controls the renderer process. Successful exploitation could run arbitrary code outside the browser sandbox.

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

## How to check

- Check the installed Chrome version: `chrome://settings/help` or `google-chrome --version`
- Compare it against the fixed version `157.0.8103.38`

## Fix

- Google Chrome: move to `157.0.8103.38` or later

## Timeline

- 2026-11-03T21:19:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121178

## From the sources

Use after free in Aura in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside 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_