Side-Channel Data Leak in Google Chrome iOS WebAuthentication

Publication date: 2026-06-30

Last updated on: 2026-06-30

Assigner: Chrome

Description

Side-channel information leakage in WebAuthentication in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-13889

EUVD

EUVD-2026-40575

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 150.0.7871.47 (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 is a side-channel information leakage issue in the WebAuthentication feature of Google Chrome on iOS versions prior to 150.0.7871.47. It allows a remote attacker to leak cross-origin data by using a specially crafted HTML page.

Impact Analysis

The vulnerability can allow a remote attacker to obtain information from other origins (websites) that should be isolated, potentially exposing sensitive data without the user's consent.

Hi! I’m here to help you understand CVE-2026-13889. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70