CVE-2026-106243

Analyzed Analyzed - Analysis Complete

Incomplete Proxy Auth Cleanup in Google Chrome

Publication date: 2026-10-06

Last updated on: 2026-10-07

Assigner: Chrome

Description

Incomplete cleanup in Proxy Auth in Google Chrome prior to 155.0.8059.39 allowed an adjacent attacker to obtain sensitive information via crafted network traffic. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-06

Last Modified

2026-10-07

Generated

2026-10-19

AI Q&A

2026-10-07

EPSS Evaluated

2026-10-18

NVD

CVE-2026-106243

EUVD

EUVD-2026-93809

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 155.0.8059.39 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-459	The product does not properly "clean up" and remove temporary or supporting resources after they have been used.

Attack-Flow Graph

Executive Summary

This vulnerability involves incomplete cleanup in Proxy Auth in Google Chrome versions before 155.0.8059.39. An attacker on the same network could exploit this to access sensitive information through specially crafted network traffic.

Detection Guidance

This vulnerability involves incomplete cleanup in Proxy Auth in Google Chrome. Detection primarily requires checking the Chrome version and monitoring network traffic for suspicious patterns. Use commands like 'google-chrome --version' to verify if your Chrome version is below 155.0.8059.39. If so, update immediately. Network monitoring tools like Wireshark can inspect traffic for proxy authentication anomalies.

Impact Analysis

If you use an affected version of Chrome, an attacker on your local network could intercept and access sensitive data like login credentials or session tokens sent through the browser.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating GDPR (data protection) and HIPAA (health information privacy) requirements if such data is exposed.

Mitigation Strategies

Update Google Chrome to version 155.0.8059.39 or later to address the incomplete cleanup issue in Proxy Auth.

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