# CVE-2026-124944: Firefox Marionette information disclosure

Source: https://junglewise.ai/threats/cve-2026-124944-information-disclosure-in-the-marionette-component-this  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-124944 · Severity: info · Published 2026-11-10

Firefox is a web browser used by millions of users worldwide. The Marionette component, which enables automated testing and remote debugging of Firefox, contains an information disclosure vulnerability that could expose sensitive data. This flaw was fixed in Firefox version 160.

Technologies: [Mozilla Firefox](https://junglewise.ai/threats/technologies/firefox). Vendors: [Mozilla](https://junglewise.ai/threats/vendors/mozilla).

## Quick answers

**Is CVE-2026-124944 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124944 being exploited in the wild.

**How severe is CVE-2026-124944?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** Mozilla Firefox before 160.

**Is there a fix for CVE-2026-124944?** Yes: fixed in Firefox 160. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-124944 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-124944?** Check whether you run Mozilla Firefox at an affected version. 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 information disclosure vulnerability exists in Firefox's Marionette component, which provides remote debugging and automation capabilities. The vulnerability allows exposure of sensitive information through the Marionette protocol. The flaw has been resolved in Firefox version 160.

## Affected products

- Mozilla Firefox before 160

## Timeline

- 2026-11-10: disclosed
- 2026-11-10: patched: Firefox 160 released

## References

- [https://bugzilla.mozilla.org/show_bug.cgi?id=2079176](https://bugzilla.mozilla.org/show_bug.cgi?id=2079176)
- [https://www.mozilla.org/security/advisories/mfsa2026-125/](https://www.mozilla.org/security/advisories/mfsa2026-125/)

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