CVE-2026-5733

Name: CVE-2026-5733
Creator: NVD / NIST
Published: 2026-04-07T13:16:47.567+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2026-5733 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.28%

19.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 149.0.2

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2022554Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-25/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-28/

Timeline

Published: Apr 7, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-5733?

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.

How severe is CVE-2026-5733?

CVE-2026-5733 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5733?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-5733?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST