CVE-2026-124939
Unknown
Last modified
CVE-2026-124939 is a vulnerability of currently unknown severity. JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7..
Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | All versions |
| Mozilla | Thunderbird | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-124939?
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.
How severe is CVE-2026-124939?
Severity scoring for CVE-2026-124939 is pending analysis.
How do I fix CVE-2026-124939?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-124933Sandbox escape in the Console component. This vulnerability …
- CVE-2026-124934Spoofing issue in the Security component. This vulnerability…
- CVE-2026-124935Undefined behavior in the WebRTC: Networking component. This…
- CVE-2026-124936Spoofing issue in the Address Bar component. This vulnerabil…
- CVE-2026-124937Other issue in the Media component in Firefox for Android. T…
- CVE-2026-124938Mitigation bypass in the Add-ons Manager component. This vul…
- CVE-2026-124940Mitigation bypass in the File Handling component. This vulne…
- CVE-2026-124941Information disclosure in the Security: RLBox component. Thi…4.3
- CVE-2026-124942Invalid pointer in the DOM: Streams component. This vulnerab…
- CVE-2026-124943Use-after-free in the Layout component. This vulnerability w…8.8
- CVE-2026-124944Information disclosure in the Marionette component. This vul…4.3
- CVE-2026-124945Invalid pointer in the Layout: Text and Fonts component. Thi…
Are you affected by CVE-2026-124939?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST