CVE-2025-14330: JIT miscompilation in the JavaScript Engine: JIT component
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146 and Firefox ESR < 140.6.
Other sources
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 140.6 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 146 - Upgrade
Upgrade
Firefox (JavaScript Engine JIT)to a version that resolves this vulnerability.Fixed in 146 - Upgrade
Upgrade
Firefox ESR (JavaScript Engine JIT)to a version that resolves this vulnerability.Fixed in 140.6 - Upgrade
Upgrade
Thunderbird (JavaScript Engine JIT)to a version that resolves this vulnerability.Fixed in 146 - Upgrade
Upgrade
Thunderbird ESR (JavaScript Engine JIT)to a version that resolves this vulnerability.Fixed in 140.6
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2025-14330?
CVE-2025-14330 is considered a high-severity vulnerability due to its potential for exploitation in affected versions of Firefox.
How do I fix CVE-2025-14330?
To fix CVE-2025-14330, update to Firefox version 146 or later, or Firefox ESR version 140.6 or later.
What versions are affected by CVE-2025-14330?
CVE-2025-14330 affects Firefox versions prior to 146 and Firefox ESR versions prior to 140.6.
What type of vulnerability is CVE-2025-14330?
CVE-2025-14330 is a Just-In-Time (JIT) miscompilation vulnerability in the JavaScript engine of Firefox.
Has CVE-2025-14330 been publicly disclosed?
Yes, CVE-2025-14330 has been publicly disclosed through Mozilla's security advisories.