CVE-2026-11126: Insufficient validation of untrusted input in DevTools

Published Apr 10, 2026
·
Updated

Chromium: CVE-2026-11126 Insufficient validation of untrusted input in DevTools

Other sources

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)

— 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

Credit

Google

Affected Software

7 affected componentsFixes available
Google Chrome<149.0.7827.53
149.0.7827.53
Microsoft Edge (Chromium-based)
Patch available
Microsoft Edge<149.0.4022.52
All of the following
Google Chrome<149.0.7827.53
Any of the following
Apple macOS
Linux Linux kernel
Microsoft Windows

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 149.0.7827.53
  2. Upgrade

    Upgrade Google Chrome to a version that resolves this vulnerability.

    Fixed in 149.0.7827.53
  3. Upgrade

    Upgrade Chromium to a version that resolves this vulnerability.

    Fixed in 149.0.7827.53
  4. Compensating control

    Restrict or disable installation of untrusted browser extensions (e.g., allow extensions only from trusted sources/enterprise policy) to reduce risk from malicious extensions that could exploit this issue.

Event History

Apr 10, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Jun 4, 2026
CVE Published
via MITRE·11:05 PM
Data Sourced
via MITRE·11:05 PM
DescriptionWeakness
Data Sourced
via NVD·11:17 PM
DescriptionSeverityWeaknessAffected Software
Jun 5, 2026
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-11126?

CVE-2026-11126 has a medium severity rating of 4.3.

2

How do I fix CVE-2026-11126?

To fix CVE-2026-11126, update Google Chrome or Microsoft Edge to version 149.0.7827.53 or later.

3

What causes CVE-2026-11126?

CVE-2026-11126 is caused by insufficient validation of untrusted input in the DevTools of Google Chrome.

4

What are the implications of CVE-2026-11126?

Exploitation of CVE-2026-11126 allows an attacker to leak cross-origin data through a malicious Chrome Extension.

5

Which software is affected by CVE-2026-11126?

CVE-2026-11126 affects Google Chrome and Microsoft Edge (Chromium-based) prior to version 149.0.7827.53.

Company

Resources

Contact

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