CVE-2026-12303: Vulnerability in Mozilla Firefox
Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152.
AI Analysis
Technical Summary
CVE-2026-12303 is an information disclosure vulnerability resulting from incorrect boundary conditions in the Graphics: WebGPU component of Mozilla Firefox. This flaw could allow unauthorized access to information due to improper handling of boundary checks. The vulnerability was addressed and fixed in Firefox 152 as part of a security update that also resolved numerous other vulnerabilities across various components. The vendor advisory classifies the impact as moderate and does not report any active exploitation in the wild.
Potential Impact
The vulnerability allows information disclosure due to incorrect boundary conditions in the WebGPU graphics component. This could potentially expose sensitive information to an attacker. However, the impact is rated moderate, indicating limited severity compared to other vulnerabilities fixed in the same release. There are no reports of exploitation in the wild.
Mitigation Recommendations
A fix for this vulnerability is available in Mozilla Firefox 152. Users and administrators should update to Firefox 152 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-12303: Vulnerability in Mozilla Firefox
Description
Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152.
CVSS v3.1
Score 4.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12303 is an information disclosure vulnerability resulting from incorrect boundary conditions in the Graphics: WebGPU component of Mozilla Firefox. This flaw could allow unauthorized access to information due to improper handling of boundary checks. The vulnerability was addressed and fixed in Firefox 152 as part of a security update that also resolved numerous other vulnerabilities across various components. The vendor advisory classifies the impact as moderate and does not report any active exploitation in the wild.
Potential Impact
The vulnerability allows information disclosure due to incorrect boundary conditions in the WebGPU graphics component. This could potentially expose sensitive information to an attacker. However, the impact is rated moderate, indicating limited severity compared to other vulnerabilities fixed in the same release. There are no reports of exploitation in the wild.
Mitigation Recommendations
A fix for this vulnerability is available in Mozilla Firefox 152. Users and administrators should update to Firefox 152 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:11.833Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"}]
Threat ID: 6a314c7e0b89be6888b4cc8b
Added to database: 6/16/2026, 1:15:42 PM
Last enriched: 6/16/2026, 1:46:10 PM
Last updated: 6/17/2026, 5:07:26 AM
Views: 10
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