Use-After-Free Vulnerability in Firefox WebGPU Component
CVE-2026-12293

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
16 June 2026

What is CVE-2026-12293?

A use-after-free vulnerability has been identified in the WebGPU component of Firefox, wherein the application fails to manage memory references correctly. This could lead to potential exploitation scenarios that compromise the security of the browser. The issue was addressed in version 152 of Firefox, emphasizing the importance of keeping your browser up to date to mitigate risks associated with this vulnerability.

Affected Version(s)

Firefox 152

Thunderbird 152

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2039568
https://www.mozilla.org/security/advisories/mfsa2026-57/
https://www.mozilla.org/security/advisories/mfsa2026-60/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

superhei
.