CVE-2026-17858
Received Received - Intake

Uninitialized Use in WebNN in Google Chrome

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: Chrome

Description
Uninitialized Use in WebNN in Google Chrome on Windows prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

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Meta Information

Published
2026-07-30
Last Modified
2026-07-30
Generated
2026-07-30
AI Q&A
2026-07-30
EPSS Evaluated
N/A
NVD
CVE-2026-17858
EUVD
EUVD-2026-50607

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
google chrome to 151.0.7922.72 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-457 The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

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Executive Summary

This vulnerability is an uninitialized use issue in WebNN (Web Neural Network API) in Google Chrome on Windows. It allows a remote attacker to access and leak cross-origin data by tricking a user into visiting a specially crafted HTML page. The issue arises because the WebNN component does not properly initialize memory before use, potentially exposing sensitive data from other websites.

Impact Analysis

If exploited, this vulnerability could allow an attacker to steal sensitive information from other websites you visit, such as login credentials, personal data, or browsing history. It may also enable tracking of your online activity across different sites without your knowledge.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating privacy regulations like GDPR or HIPAA if it involves personal or health data. Organizations may face compliance breaches, legal penalties, or reputational damage due to potential data leaks.

Mitigation Strategies

Update Google Chrome to version 151.0.7922.72 or later to address the vulnerability.

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