Quick answers
- Is CVE-2026-124946 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-124946 being exploited in the wild.
- How severe is CVE-2026-124946?
- Informational severity, published 10 November 2026.
- Which products and versions are affected?
- Mozilla Firefox.
- Is there a fix for CVE-2026-124946?
- Yes: fixed in Firefox 160. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-124946 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-124946?
- Check whether you run Mozilla Firefox. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: Firefox 160
Technical details
An invalid pointer in the JavaScript Engine's JIT component can lead to memory corruption when the JIT compiler processes malicious JavaScript code. This is a memory safety vulnerability that requires user interaction (visiting a malicious site) over the network. Successful exploitation could result in denial of service or code execution within the browser sandbox.
Affected products
- Mozilla Firefox
Timeline
- 2026-11-10: disclosed