---
id: CVE-2026-121242
title: >-
  Improper input validation in WebPackaging in Google Chrome prior to
  157.0.8103.38 allowed a remote attacker to bypass web origin policy via
  crafted network traffic
summary: >-
  Improper input validation in WebPackaging in Google Chrome prior to
  157.0.8103.38 allowed a remote attacker to bypass web origin policy via
  crafted network traffic. (Chromium security severity: Medium)
severity: none
cwe:
  - CWE-20
vendor: Google
product: Chrome
affected:
  - Chrome >= 157.0.8103.38 < 157.0.8103.38
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T20:42:38.262Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121242'
references:
  - url: >-
      https://chromereleases.googleblog.com/2026/11/stable-channel-update-for-desktop.html
  - url: 'https://issues.chromium.org/issues/566857543'
tags:
  - cve.org
epss: 0.00181
epssPercentile: 0.07762
ingestedAt: '2026-11-05T20:33:06.459Z'
---

## Overview

Improper input validation in WebPackaging in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via crafted network traffic. (Chromium security severity: Medium)

## Affected

- `Chrome >= 157.0.8103.38 < 157.0.8103.38`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.