CVE-2026-13919: Insufficient data validation in Extensions on 2026-05-08

Published May 8, 2026
·
Updated

Chromium: CVE-2026-13919 Insufficient data validation in Extensions

Other sources

Insufficient policy enforcement in Extensions in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)

— 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

Affected Software

4 affected componentsFixes available
Google Chrome<150.0.7871.47
Google Chrome<150.0.7871.47
Microsoft Edge (Chromium-based)<150.0.4078.48
150.0.4078.48
Microsoft Edge<150.0.4078.48

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 150.0.4078.48
  2. Upgrade

    Upgrade Chromium to a version that resolves this vulnerability.

    Fixed in 150.0.7871.47
  3. Compensating control

    Ensure site isolation policies are not bypassable for Extension-related flows by limiting exposure of renderer compromise (e.g., restrict or harden untrusted renderer content and reduce the likelihood of a compromised renderer process).

Event History

Jun 30, 2026
CVE Published
via MITRE·10:38 PM
Data Sourced
via MITRE·10:38 PM
DescriptionWeakness
Data Sourced
via NVD·11:17 PM
DescriptionSeverityWeaknessAffected Software
Jul 3, 2026
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
DescriptionAffected Software
Jul 16, 2026
Data Sourced
12:00 AM
SeverityWeakness

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-2026-13919?

CVE-2026-13919 has a medium severity rating of 6.5 according to the CVSS 3.1 score.

2

How do I fix CVE-2026-13919?

To mitigate CVE-2026-13919, update Google Chrome or Microsoft Edge to the latest version released after 150.0.7871.47.

3

What issue does CVE-2026-13919 address?

CVE-2026-13919 addresses insufficient data validation in Extensions that allows attackers to bypass site isolation.

4

Which browsers are affected by CVE-2026-13919?

CVE-2026-13919 affects Google Chrome versions prior to 150.0.7871.47 and Microsoft Edge (Chromium-based) versions before a specific update.

5

When was CVE-2026-13919 published?

CVE-2026-13919 was published on May 8, 2026.

Company

Resources

Contact

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