CVE-2026-12303

MediumCVSS 4.3/10Last modified Oct 26, 2026

Description

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

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-125

Affected software

Vendor	Product	Versions
Mozilla	Firefox	—
Mozilla	Thunderbird	—

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2034608Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-57/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-60/Vendor Advisory

Timeline

Published: Jun 16, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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