---
id: "CVE-2026-121087"
kind: "vulnerability"
aliases: ["CVE-2026-121087"]
title: "Chrome for Android: crafted page bypasses web origin policy, fixed in 157"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["android", "chrome", "ios", "mobile", "package"]
not_affected_if: ["desktop-only-use", "updated-chrome"]
published_at: "2026-11-03T21:17:14+00:00"
first_seen_at: "2026-11-03T21:19:12+00:00"
updated_at: "2026-11-03T21:25:33+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121087", "first_seen_at": "2026-11-03T21:19:12+00:00"}]
---

# Chrome for Android: crafted page bypasses web origin policy, fixed in 157

Improper input validation in the mobile version of Google Chrome lets a remote attacker bypass the web origin policy using a crafted HTML page. Chromium rates it High severity, and the sources give no further detail on what data is exposed.

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

## How to check

- Open Chrome on the phone and check the version under Settings > About Chrome.
- Fleet tools can report the Chrome version per device, if the team manages devices.

## Fix

- Chrome for mobile prior to `157.0.8103.38` is affected; move to `157.0.8103.38` or later.

## Timeline

- 2026-11-03T21:19:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121087

## From the sources

Improper input validation in Mobile 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: 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_