Insufficient Input Validation in Google Chrome FedCM

Publication date: 2026-05-06

Last updated on: 2026-05-07

Assigner: Chrome

Description

Insufficient validation of untrusted input in FedCM in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-05-06

Last Modified

2026-05-07

Generated

2026-07-06

AI Q&A

2026-05-06

EPSS Evaluated

2026-07-04

NVD

CVE-2026-8013

EUVD

EUVD-2026-28129

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 148.0.7778.96 (exc)

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 insufficient validation of untrusted input in the FedCM feature of Google Chrome versions prior to 148.0.7778.96. It allows a remote attacker to leak cross-origin data by using a specially crafted HTML page.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of data from different origins, potentially exposing sensitive information to attackers through cross-origin data leaks.

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