CVE-2026-8389: Vulnerability in Mozilla Firefox
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
AI Analysis
Technical Summary
CVE-2026-8389 describes a vulnerability in the JIT component of the JavaScript Engine in Mozilla Firefox. The flaw involves miscompilation during JIT processing, potentially causing incorrect execution of JavaScript code. This vulnerability was addressed and fixed in Firefox version 150.0.3. The CVSS v3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause denial of service by exploiting the JIT miscompilation flaw. The impact is rated high across confidentiality, integrity, and availability, meaning sensitive data could be exposed or altered, and system stability could be compromised.
Mitigation Recommendations
A fix is available and included in Mozilla Firefox version 150.0.3. Users and administrators should update affected Firefox installations to version 150.0.3 or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-8389: Vulnerability in Mozilla Firefox
Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
CVSS v3.1
Score 8.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8389 describes a vulnerability in the JIT component of the JavaScript Engine in Mozilla Firefox. The flaw involves miscompilation during JIT processing, potentially causing incorrect execution of JavaScript code. This vulnerability was addressed and fixed in Firefox version 150.0.3. The CVSS v3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause denial of service by exploiting the JIT miscompilation flaw. The impact is rated high across confidentiality, integrity, and availability, meaning sensitive data could be exposed or altered, and system stability could be compromised.
Mitigation Recommendations
A fix is available and included in Mozilla Firefox version 150.0.3. Users and administrators should update affected Firefox installations to version 150.0.3 or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-12T12:36:11.734Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-45/","vendor":"Mozilla"}]
Threat ID: 6a032959cbff5d8610e85ace
Added to database: 05/12/2026, 13:21:29 UTC
Last enriched: 07/15/2026, 08:14:13 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 120
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