CVE-2026-121087

Awaiting Analysis Awaiting Analysis - Queue

Improper Input Validation in Google Chrome

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description

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)

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-121087

EUVD

EUVD-2026-116397

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 Mobile Google Chrome versions before 157.0.8103.38. A remote attacker could exploit it by crafting a malicious HTML page to bypass web origin policy, potentially gaining unauthorized access to sensitive data or actions on behalf of the user.

Impact Analysis

If exploited, this vulnerability could allow an attacker to impersonate you on websites, steal session cookies, or access sensitive information like passwords or personal data. It may also enable phishing attacks or unauthorized actions on trusted sites.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR (data protection) and HIPAA (health information privacy). Organizations using vulnerable Chrome versions may face legal penalties, reputational damage, and loss of customer trust due to unauthorized data exposure.

Mitigation Strategies

Update Google Chrome to version 157.0.8103.38 or later to address the improper input validation flaw.

Hi! I’m here to help you understand CVE-2026-121087. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70

EPSS Chart

Security Radar

News mentioning this vulnerability

Loading related security news...