CVE-2026-12303

4.3 MEDIUM

Published: June 16, 2026 Modified: June 16, 2026

Description

Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=2034608

Source: security@mozilla.org

Permissions Required

https://www.mozilla.org/security/advisories/mfsa2026-57/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2026-60/

Source: security@mozilla.org

Vendor Advisory

3 reference(s) from NVD

Quick Stats

CVSS v3 Score

4.3 / 10.0

EPSS (Exploit Probability)

0.2%

13th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-125

Affected Vendors

mozilla

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