---
id: "CVE-2026-121222"
kind: "vulnerability"
aliases: ["CVE-2026-121222"]
title: "Chrome: crafted web page bypasses origin policy in Forms"
severity: "low"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "runtime"]
not_affected_if: ["chrome-updated"]
published_at: "2026-11-03T21:17:31+00:00"
first_seen_at: "2026-11-03T21:19:27+00:00"
updated_at: "2026-11-03T21:21:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121222", "first_seen_at": "2026-11-03T21:19:27+00:00"}]
---

# Chrome: crafted web page bypasses origin policy in Forms

Google Chrome's Forms component did not check authorization correctly, so a crafted HTML page can get around web origin restrictions. The attacker gets to act across site boundaries in the browser, with Chromium rating the issue low severity.

_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 version number
- Compare it against the fixed version `157.0.8103.38`

## Fix

- Google Chrome: `157.0.8103.38` or later

## Timeline

- 2026-11-03T21:19:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121222

## From the sources

Incorrect authorization in Forms in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

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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_