FedCM Same Origin Policy Bypass in Google Chrome

Publication date: 2026-06-30

Last updated on: 2026-06-30

Assigner: Chrome

Description

Inappropriate implementation in FedCM in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Low)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-30

Last Modified

2026-06-30

Generated

2026-07-01

AI Q&A

2026-07-01

EPSS Evaluated

N/A

NVD

CVE-2026-14057

EUVD

EUVD-2026-40744

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	150.0.7871.47

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is an inappropriate implementation in FedCM within Google Chrome versions prior to 150.0.7871.47. It allows a remote attacker to bypass the same origin policy by using a specially crafted HTML page.

Impact Analysis

By bypassing the same origin policy, a remote attacker could potentially access or manipulate data from other origins that should be isolated, leading to unauthorized data exposure or actions within the browser.

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