CVE-2026-12303
published 2026-06-16CVE-2026-12303: Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
PriorityP418medium4.3CVSS 3.1
AVNACLPRNUIRSUCLINAN
EPSS
0.22%
12.7th percentile
Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 152 | Firefox 152 |
| mozilla | firefox | < 152.0 | 152.0 |
| mozilla | thunderbird | < Thunderbird 152 | Thunderbird 152 |
| mozilla | thunderbird | < 152.0.0 | 152.0.0 |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
vendor_redhat4.3MEDIUM
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Red Hat
firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component
vendor_redhat·2026-06-16·CVSS 4.3
CVE-2026-12303 [MEDIUM] CWE-125 firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component
firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component
Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Re
Mozilla
Mozilla Foundation Security Advisory 2026-57: CVE-2026-12303
vendor_mozilla·CVSS 4.3
CVE-2026-12303 [MEDIUM] Mozilla Foundation Security Advisory 2026-57: CVE-2026-12303
Mozilla Foundation Security Advisory 2026-57
CVE: CVE-2026-12303
Product: Firefox
Impact: high
Fixed in: Firefox 152
Mozilla
Mozilla Foundation Security Advisory 2026-60: CVE-2026-12303
vendor_mozilla·CVSS 4.3
CVE-2026-12303 [MEDIUM] Mozilla Foundation Security Advisory 2026-60: CVE-2026-12303
Mozilla Foundation Security Advisory 2026-60
CVE: CVE-2026-12303
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 152
GHSA
Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component.
ghsa_unreviewed·2026-06-16
CVE-2026-12303 [MEDIUM] CWE-125 Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component.
Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152.
No detection rules found.
No public exploits indexed.
2026-06-16
Published