CVE-2026-11259: Insufficient validation of untrusted input in Cast

Published Apr 3, 2026
·
Updated

Chromium: CVE-2026-11259 Insufficient validation of untrusted input in Cast

Other sources

Insufficient validation of untrusted input in Cast in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy 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
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. Operational

    Ensure Microsoft Edge (Chromium-based) is updated to a release that incorporates Chromium 149.0.7827.53 so the Chromium fix is applied.

Event History

Apr 3, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Jun 4, 2026
CVE Published
via MITRE·11:06 PM
Data Sourced
via MITRE·11:06 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-2026-11259?

CVE-2026-11259 has a severity rating of low.

2

How do I fix CVE-2026-11259?

To fix CVE-2026-11259, update Google Chrome to version 149.0.7827.53 or later.

3

What impact does CVE-2026-11259 have on users?

CVE-2026-11259 can allow a remote attacker to bypass the same origin policy through crafted HTML pages.

4

Which software is affected by CVE-2026-11259?

CVE-2026-11259 affects Google Chrome versions prior to 149.0.7827.53.

5

When was CVE-2026-11259 published?

CVE-2026-11259 was published on April 3, 2026.

Company

Resources

Contact

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