CVE-2026-16386: Vulnerability in Mozilla Firefox
CVE-2026-16386 is an information disclosure vulnerability in Mozilla Firefox's Graphics: WebGPU component caused by uninitialized memory. This flaw allows unauthorized disclosure of information but does not affect integrity or availability. The vulnerability was fixed in Firefox version 153. No known exploits are reported in the wild.
AI Analysis
Technical Summary
CVE-2026-16386 is a vulnerability in Mozilla Firefox affecting the Graphics: WebGPU component where uninitialized memory can be disclosed, leading to information leakage. This issue was addressed and fixed in Firefox 153. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high confidentiality impact. The vendor advisory confirms the fix in Firefox 153 and Thunderbird 153 and does not report active exploitation in the wild.
Potential Impact
The vulnerability allows an attacker to gain unauthorized access to information from uninitialized memory in the WebGPU graphics component of Firefox. This could lead to disclosure of sensitive data but does not impact system integrity or availability. Since the flaw is fixed in Firefox 153, users running earlier versions remain vulnerable until updated.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153. Users and administrators should update affected Firefox installations to version 153 or later to remediate this issue. No additional mitigations are specified or required beyond applying the official update.
CVE-2026-16386: Vulnerability in Mozilla Firefox
Description
CVE-2026-16386 is an information disclosure vulnerability in Mozilla Firefox's Graphics: WebGPU component caused by uninitialized memory. This flaw allows unauthorized disclosure of information but does not affect integrity or availability. The vulnerability was fixed in Firefox version 153. No known exploits are reported in the wild.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16386 is a vulnerability in Mozilla Firefox affecting the Graphics: WebGPU component where uninitialized memory can be disclosed, leading to information leakage. This issue was addressed and fixed in Firefox 153. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high confidentiality impact. The vendor advisory confirms the fix in Firefox 153 and Thunderbird 153 and does not report active exploitation in the wild.
Potential Impact
The vulnerability allows an attacker to gain unauthorized access to information from uninitialized memory in the WebGPU graphics component of Firefox. This could lead to disclosure of sensitive data but does not impact system integrity or availability. Since the flaw is fixed in Firefox 153, users running earlier versions remain vulnerable until updated.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153. Users and administrators should update affected Firefox installations to version 153 or later to remediate this issue. No additional mitigations are specified or required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:57:02.260Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbe2a4a8d5989262601
Added to database: 07/21/2026, 12:57:34 UTC
Last enriched: 07/30/2026, 10:22:58 UTC
Last updated: 08/31/2026, 10:52:07 UTC
Views: 50
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