CVE-2026-17858

Analyzed Analyzed - Analysis Complete

Uninitialized Use in WebNN in Google Chrome

Publication date: 2026-07-30

Last updated on: 2026-08-03

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)

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-30

Last Modified

2026-08-03

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-17858

EUVD

EUVD-2026-50607

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 151.0.7922.72 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-457	The code uses a variable that has not been initialized, leading to unpredictable or unintended results.
CWE-346	The product does not properly verify that the source of data or communication is valid.

Attack-Flow Graph

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.

Detection Guidance

This vulnerability is specific to Google Chrome and cannot be directly detected via general network or system commands. Ensure your Chrome browser is updated to version 151.0.7922.72 or later to mitigate the risk.

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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