CVE-2026-121236

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Improper Input Validation in Google Chrome

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description

Improper input validation in Network 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)

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-11-03

Last Modified

2026-11-03

Generated

2026-11-04

AI Q&A

2026-11-04

EPSS Evaluated

N/A

NVD

CVE-2026-121236

EUVD

EUVD-2026-116335

Affected Vendors & Products

Vendor	Product	Version / Range
Google	Chrome	157.0.8103.38

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper input validation in Google Chrome's network component. A remote attacker could exploit it by crafting a malicious HTML page to bypass the web origin policy, which normally restricts how documents interact with resources from different origins.

Impact Analysis

An attacker could use this flaw to access or manipulate data on websites you visit, potentially stealing sensitive information like cookies, session tokens, or personal data. It may also enable phishing attacks or unauthorized actions on your behalf.

Compliance Impact

This vulnerability could lead to unauthorized data access or breaches, violating GDPR's data protection principles or HIPAA's safeguards for protected health information. Organizations may face compliance penalties if exploited.

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