Boundary Condition Flaw in WebGPU Component of Firefox by Mozilla
CVE-2026-5733

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
7 April 2026

What is CVE-2026-5733?

This vulnerability in the Graphics: WebGPU component of Firefox arises from incorrect boundary conditions, which may allow for unexpected behavior or potential exploitation. Affected users should update to version 149.0.2 or later to mitigate risks associated with this flaw.

Affected Version(s)

Firefox < 149.0.2

Thunderbird < 149.0.2

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2022554
https://www.mozilla.org/security/advisories/mfsa2026-25/
https://www.mozilla.org/security/advisories/mfsa2026-28/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Inseo An
.