CVE-2026-12303 | Information disclosure due to incorrect boundary conditions … | CVSS 4.3 MEDIUM

Description

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

Metadata

CVE ID: CVE-2026-12303
State: PUBLISHED
Assigner: mozilla
Reserved: 2026-06-15 15:08 UTC
Published: 2026-06-16 11:52 UTC
Last updated: 2026-06-16 16:08 UTC
Primary CWE: CWE-125
CWE-125 Out-of-bounds Read
Vendor / Product: Mozilla / Firefox
Sources: cve.org · NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (2)

Vendor	Product	Platform	Versions
Mozilla	Firefox	—	152 ≤ *
Mozilla	Thunderbird	—	152 ≤ *

Weakness (CWE)

CWE	Source	Description
CWE-125	adp	CWE-125 Out-of-bounds Read

CVSS scores (1)

Score	Severity	Version	Source	Vector
4.3	MEDIUM	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

References (3)