CVE-2026-121242
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Improper Input Validation in Google Chrome WebPackaging

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description
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)

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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-2026-121242
EUVD
EUVD-2026-116441

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Google Chrome 157.0.8103.38

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Exploitability

CWE
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KEV
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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.

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Executive Summary

This vulnerability involves improper input validation in WebPackaging in Google Chrome. It allows a remote attacker to bypass web origin policy through crafted network traffic, potentially enabling unauthorized access or actions on affected systems.

Impact Analysis

If exploited, this vulnerability could allow attackers to bypass security restrictions, access sensitive data, or perform unauthorized actions on websites or applications you use through Chrome. Users of vulnerable Chrome versions are at risk of data breaches or phishing attacks.

Compliance Impact

This vulnerability could lead to unauthorized data access or breaches, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Organizations using vulnerable Chrome versions may face compliance violations, legal penalties, or reputational damage.

Mitigation Strategies

Update Google Chrome to version 157.0.8103.38 or later to address the improper input validation issue in WebPackaging.

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