CVE-2026-11243: Incorrect security UI in Downloads

Published Mar 29, 2026
·
Updated

Chromium: CVE-2026-11243 Incorrect security UI in Downloads

Other sources

Inappropriate implementation in Downloads in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)

— 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

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

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 Chromium to a version that resolves this vulnerability.

    Fixed in 149.0.7827.53
  3. Upgrade

    Upgrade Google Chrome to a version that resolves this vulnerability.

    Fixed in 149.0.7827.53
  4. Operational

    For Microsoft Edge (Chromium-based), apply Microsoft Edge updates as they become available that include the Chromium fix (Chromium 149.0.7827.53). Ensure Edge installations are updated to a release that ingests the fixed Chromium build.

Event History

Mar 29, 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
Jun 5, 2026
Data Sourced
via NVD·12:17 AM
DescriptionSeverityWeaknessAffected Software
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-2026-11243?

The severity of CVE-2026-11243 is medium, rated at 5.4 according to the CVSS 3.1 scoring system.

2

How do I fix CVE-2026-11243?

To fix CVE-2026-11243, update Google Chrome and Microsoft Edge to the latest versions prior to 149.0.7827.53.

3

What vulnerability does CVE-2026-11243 address?

CVE-2026-11243 addresses an incorrect security UI in the Downloads feature of Google Chrome.

4

What are the potential impacts of CVE-2026-11243?

The potential impact of CVE-2026-11243 includes allowing a remote attacker to bypass navigation restrictions through a crafted HTML page.

5

Which software is affected by CVE-2026-11243?

CVE-2026-11243 affects Google Chrome and Microsoft Edge, both in their Chromium-based versions.

Company

Resources

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