PT-2026-49672 · Mozilla · Firefox

Michal Andryskowski · Published 2026-06-16 · Updated 2026-06-16 · CVE-2026-12303

Mitre

CVSS v3.1

4.3

Medium

Base vector

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

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

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-12303

Affected Products

Firefox

References · 3

• https://mozilla.org/security/advisories/mfsa2026-57 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-12303 · Security Note
• https://bugzilla.mozilla.org/show_bug.cgi?id=2034608 · Note