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
The vulnerability CVE-2026-8389 involves a miscompilation issue in the JavaScript Engine's JIT component of Mozilla Firefox. This flaw could lead to incorrect execution of JavaScript code due to improper JIT compilation. The issue was reported by researcher ggwhyp and addressed by Mozilla in Firefox 150.0.3. The vendor advisory classifies the impact as high and includes this fix as part of a security update addressing multiple high-impact JavaScript engine vulnerabilities.
Potential Impact
The vulnerability can cause the JavaScript engine to miscompile code, potentially leading to incorrect program behavior or security issues within Firefox. The vendor rates the impact as high, indicating significant risk if exploited. No active exploitation has been reported.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 150.0.3. Users and administrators should update to this version or later to remediate the issue. 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-8389 involves a miscompilation issue in the JavaScript Engine's JIT component of Mozilla Firefox. This flaw could lead to incorrect execution of JavaScript code due to improper JIT compilation. The issue was reported by researcher ggwhyp and addressed by Mozilla in Firefox 150.0.3. The vendor advisory classifies the impact as high and includes this fix as part of a security update addressing multiple high-impact JavaScript engine vulnerabilities.
Potential Impact
The vulnerability can cause the JavaScript engine to miscompile code, potentially leading to incorrect program behavior or security issues within Firefox. The vendor rates the impact as high, indicating significant risk if exploited. No active exploitation has been reported.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 150.0.3. Users and administrators should update to this version or later to remediate the issue. 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: 5/12/2026, 1:21:29 PM
Last enriched: 5/12/2026, 1:37:31 PM
Last updated: 5/13/2026, 3:58:08 AM
Views: 9
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