CVE-2026-17977

Analyzed Analyzed - Analysis Complete

Policy Bypass in CSS in Google Chrome

Publication date: 2026-07-30

Last updated on: 2026-08-03

Assigner: Chrome

Description

Policy bypass in CSS in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-17977

EUVD

EUVD-2026-50903

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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 a policy bypass in CSS within Google Chrome versions before 151.0.7922.72. It allows a remote attacker to access cross-origin data by exploiting a crafted HTML page.

Detection Guidance

This vulnerability is specific to Google Chrome versions prior to 151.0.7922.72. To detect it, check your Chrome version by running chrome://version/ in the browser. If your version is below 151.0.7922.72, the system is vulnerable. Update Chrome to the latest version to mitigate the issue.

Impact Analysis

An attacker could exploit this to steal sensitive data from other websites you visit, potentially exposing personal information, login credentials, or other confidential data.

Compliance Impact

This vulnerability involves policy bypass in CSS allowing cross-origin data leaks, which could potentially expose sensitive user data. Such data exposure may impact compliance with GDPR (data protection) and HIPAA (health information privacy) by violating confidentiality requirements. However, the severity is rated as Low, suggesting limited impact on compliance.

Mitigation Strategies

Update Google Chrome to version 151.0.7922.72 or later to address the policy bypass vulnerability in CSS.

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