Information Disclosure Vulnerability in Firefox WebGPU Component
CVE-2026-12303

4.3MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Vendor
CVE Published:
16 June 2026

What is CVE-2026-12303?

An information disclosure vulnerability exists in the WebGPU component of Firefox due to incorrect boundary conditions. This flaw could allow an attacker to gain unauthorized access to sensitive information. The issue was identified and subsequently resolved in Firefox version 152, addressing the potential risks associated with this vulnerability. For further details, refer to Mozilla's security advisories and related discussions.

Affected Version(s)

Firefox 152

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2034608
https://www.mozilla.org/security/advisories/mfsa2026-57/

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Michal Andryskowski
.