CVE-2026-9990: Use after free in WebAppInstalls

Published May 14, 2026
·
Updated

Chromium: CVE-2026-9990 Use after free in WebAppInstalls

Other sources

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

Use after free in WebAppInstalls in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

— MITRE

Credit

Google

Affected Software

6 affected componentsFixes available
Google Google Chrome<148.0.7778.216
Google Chrome<148.0.7778.216
148.0.7778.216
All of the following
Google Chrome<148.0.7778.216
Apple macOS
Microsoft Edge (Chromium-based)
Patch available
Microsoft Edge<148.0.3967.96

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 148.0.7778.216
  2. Upgrade

    Upgrade Google Chrome / Chromium to a version that resolves this vulnerability.

    Fixed in 148.0.7778.216
  3. Compensating control

    If you cannot upgrade immediately, reduce exposure to this issue by preventing remote attackers from delivering and having users open crafted HTML pages that rely on specific UI gestures.

Event History

May 14, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
May 28, 2026
CVE Published
via MITRE·10:25 PM
Data Sourced
via MITRE·10:25 PM
DescriptionWeakness
Data Sourced
via NVD·11:16 PM
DescriptionSeverityWeaknessAffected Software
May 29, 2026
Data Sourced
via Microsoft·11:21 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·11:21 PM
DescriptionAffected Software
Jun 29, 58424
Event
via FIRST·09:51 AM

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-2026-9990?

The severity of CVE-2026-9990 is rated high with a score of 7.5 according to the CVSS 3.1.

2

How does CVE-2026-9990 affect users of Microsoft Edge?

CVE-2026-9990 affects users of Microsoft Edge as it ingests Chromium components, which contain this vulnerability.

3

What is a use after free vulnerability as seen in CVE-2026-9990?

A use after free vulnerability, like CVE-2026-9990, occurs when a program continues to use memory after it has been freed, potentially leading to arbitrary code execution.

4

How do I fix CVE-2026-9990?

To fix CVE-2026-9990, update to the latest version of Google Chrome or Microsoft Edge that addresses the vulnerability.

5

What products are affected by CVE-2026-9990?

CVE-2026-9990 affects Google Chrome and Microsoft Edge (Chromium-based) prior to the latest security updates.

Company

Resources

Contact

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