CVE-2026-84130: Vulnerability in Mozilla Firefox
Description
Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
CVSS v3.1
Score 7.5high
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84130 is a high-severity information disclosure vulnerability affecting the Graphics: WebGPU component in Mozilla Firefox. The flaw could allow an attacker to gain access to sensitive information. Mozilla fixed this vulnerability in Firefox 155 and Firefox ESR 153.2. The CVSS v3.1 base score is 7.5 with vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, indicating network attack vector, low attack complexity, no privileges or user interaction required, unchanged scope, and high confidentiality impact with no impact on integrity or availability. The vendor advisories MFSA2026-82 and MFSA2026-85 provide detailed information and confirm remediation in the stated versions.
Potential Impact
Successful exploitation of this vulnerability could lead to unauthorized disclosure of sensitive information from the Graphics: WebGPU component in Firefox. There is no impact on integrity or availability. No active exploitation has been reported in the wild.
Mitigation Recommendations
Mozilla has fixed this vulnerability in Firefox 155 and Firefox ESR 153.2. Users and administrators should update to these versions or later to mitigate this issue. No additional mitigation actions are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-01T07:25:31.624Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-82/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-85/","vendor":"Mozilla"}]
Threat ID: 6a96cab2acd9273b49b6857f
Added to database: 09/01/2026, 12:53:06 UTC
Last enriched: 09/07/2026, 12:58:54 UTC
Last updated: 10/17/2026, 06:48:21 UTC
Views: 56
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