CVE-2026-106266: Confused deputy in Contextual Tasks on 2026-04-12

Published Oct 6, 2026
·
Updated

Chromium CVE-2026-106266: Confused deputy

Other sources

Confused deputy in Contextual Tasks in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Medium)

— MITRE

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

Affected Software

2 affected componentsFixes available
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 155.0.4283.45
  2. Upgrade

    Upgrade Google Chrome to a version that resolves this vulnerability.

    Fixed in 155.0.8059.39

Event History

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
Oct 20, 2026
Data Sourced
12:00 AM
SeverityWeakness

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?

The issue affects Google Chrome versions before 155.0.8059.39. Exploitation requires the attacker to have already compromised the renderer process, so it is primarily relevant as a follow-on privilege-boundary bypass rather than a standalone initial compromise.

2

What access does an attacker need to exploit it?

An attacker needs control of a compromised Chrome renderer process and a crafted HTML page. Under those conditions, they can bypass web origin policy into a privileged page.

3

What should be done to remediate the issue?

Update Google Chrome to version 155.0.8059.39 or later. The provided information does not describe a configuration workaround or mitigation for systems that cannot be updated immediately.

Company

Resources

Contact

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