CVE-2026-16393: Incorrect boundary conditions in the Graphics: WebGPU component

Published Jul 21, 2026
·
Updated

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Affected Software

5 affected componentsFixes available
Mozilla Firefox<=153
Mozilla Firefox<153
153
Mozilla Thunderbird<153
153
Mozilla Firefox<153.0.0
Mozilla Thunderbird<153.0

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 153
  2. Upgrade

    Upgrade Firefox/Thunderbird (Graphics: WebGPU component) to a version that resolves this vulnerability.

    Fixed in 153

Event History

Jul 21, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·12:38 PM
Data Sourced
via MITRE·12:38 PM
Description
Data Sourced
via NVD·01:17 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-16393?

The severity of CVE-2026-16393 is critical with a CVSS score of 9.1.

2

How do I fix CVE-2026-16393?

CVE-2026-16393 can be fixed by updating to Firefox 153 or Thunderbird 153.

3

What component is affected by CVE-2026-16393?

CVE-2026-16393 affects the Graphics: WebGPU component.

4

What type of vulnerability is CVE-2026-16393?

CVE-2026-16393 is categorized as a buffer overflow vulnerability.

5

When was CVE-2026-16393 published?

CVE-2026-16393 was published on July 21, 2026.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203