CVE-2026-106243: Incomplete cleanup in Proxy Auth

Published Jul 10, 2026
·
Updated

Chromium CVE-2026-106243: Incomplete cleanup

Other sources

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)

— NVD

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.

— Microsoft

Credit

Google

Affected Software

3 affected componentsFixes available
Google Chrome<155.0.8059.39
155.0.8059.39
Google Chrome<155.0.8059.39
Microsoft Edge (Chromium-based)<155.0.4283.45
155.0.4283.45

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 155.0.8059.39
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 155.0.4283.45
  3. Upgrade

    Upgrade Google Chrome to a version that resolves this vulnerability.

    Fixed in 155.0.8059.39

Event History

Jul 10, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Oct 6, 2026
CVE Published
via MITRE·06:41 PM
Data Sourced
via MITRE·06:41 PM
DescriptionWeakness
Data Sourced
via NVD·07:17 PM
DescriptionSeverityWeaknessAffected Software
Oct 16, 2026
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

Who is realistically exposed to this issue?

Systems running Google Chrome before 155.0.8059.39 are exposed when an attacker can operate on an adjacent network path. The CVSS vector indicates network-adjacent access rather than remote Internet-only access.

2

Does exploitation require an account or user interaction?

No. The CVSS vector indicates no privileges and no user interaction are required, although exploitation has high attack complexity and requires crafted network traffic.

3

What is the impact if exploitation succeeds?

An adjacent attacker may obtain sensitive information. The provided CVSS vector rates confidentiality impact as high and indicates no integrity or availability impact.

4

How can I determine whether remediation is needed?

Check the installed Google Chrome version. Versions earlier than 155.0.8059.39 require an update to address this issue.

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