---
id: "CVE-2026-121172"
kind: "vulnerability"
aliases: ["CVE-2026-121172"]
title: "Chrome: crafted web page can spoof browser UI elements"
severity: "low"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "package"]
not_affected_if: ["chrome-up-to-date"]
published_at: "2026-11-03T21:17:25+00:00"
first_seen_at: "2026-11-03T21:19:24+00:00"
updated_at: "2026-11-03T21:23:16+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121172", "first_seen_at": "2026-11-03T21:19:24+00:00"}]
---

# Chrome: crafted web page can spoof browser UI elements

Google Chrome before 157.0.8103.38 has an authorization flaw in its Isolated component that lets a remote attacker display fake UI elements through a crafted HTML page. The source rates the Chromium security severity as Low and reports no code execution or data theft.

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

## How to check

- Check the installed Chrome version in the browser's About page or with `chrome --version`.
- Compare it against `157.0.8103.38`; anything older is in the affected range.

## 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-2026-121172

## From the sources

Incorrect authorization in Isolated in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to spoof UI elements via a crafted HTML page. (Chromium security severity: Low)

---

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