Cross-Origin Data Leak in Google Chrome DevTools

Publication date: 2026-06-04

Last updated on: 2026-06-09

Assigner: Chrome

Description

Inappropriate implementation in DevTools in Google Chrome prior to 149.0.7827.53 allowed an attacker who convinced a user to install a malicious extension to leak cross-origin data via a crafted Chrome Extension. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-04

Last Modified

2026-06-09

Generated

2026-07-15

AI Q&A

2026-06-05

EPSS Evaluated

2026-07-14

NVD

CVE-2026-11126

EUVD

EUVD-2026-34587

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 is an inappropriate implementation in the DevTools component of Google Chrome versions prior to 149.0.7827.53. It allows an attacker who convinces a user to install a malicious Chrome extension to leak cross-origin data by using a specially crafted extension.

Impact Analysis

If exploited, this vulnerability can lead to unauthorized leakage of cross-origin data through a malicious Chrome extension. This means sensitive information from different origins or websites could be exposed to attackers, potentially compromising user privacy and security.

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