---
id: "CVE-2026-120930"
kind: "vulnerability"
aliases: ["CVE-2026-120930"]
title: "Google Chrome: incorrect authorization lets a crafted web page bypass origin policy"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop", "mobile", "runtime"]
not_affected_if: ["chrome-156.0.8078.47-or-later"]
published_at: "2026-11-03T22:19:31+00:00"
first_seen_at: "2026-11-03T23:15:08+00:00"
updated_at: "2026-11-03T23:16:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120930", "first_seen_at": "2026-11-03T23:15:08+00:00"}]
---

# Google Chrome: incorrect authorization lets a crafted web page bypass origin policy

Chrome's Blink rendering engine has an incorrect authorization flaw that lets a remote attacker bypass the web origin policy using a crafted HTML page. An attacker can read or act on data from other sites a visitor has open.

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

## How to check

- Check the installed Chrome version in Chrome's About page (chrome://settings/help) or with the browser's version output.
- Compare it against the fixed version below.

## Fix

- Google Chrome: move to `156.0.8078.47` or later.

## Timeline

- 2026-11-03T23:15:08+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120930

## From the sources

Incorrect authorization in Blink in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to bypass web origin policy 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_