Insufficient Input Validation in Google Chrome WebUI Leads to Cross-Origin Data Leak

Publication date: 2026-06-04

Last updated on: 2026-06-08

Assigner: Chrome

Description

Insufficient validation of untrusted input in WebUI in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process 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

2026-06-04

Last Modified

2026-06-08

Generated

2026-07-15

AI Q&A

2026-06-05

EPSS Evaluated

2026-07-14

NVD

CVE-2026-11105

EUVD

EUVD-2026-34566

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 149.0.7827.53 (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 WebUI component of Google Chrome versions prior to 149.0.7827.53. It allows a remote attacker, who has already compromised the renderer process, to leak cross-origin data by using a specially crafted HTML page.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of cross-origin data, meaning sensitive information from other websites or web applications could be leaked to an attacker. This could compromise user privacy and security if an attacker exploits the renderer process.

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