# CVE-2026-124929: Mozilla Firefox information disclosure in Layout Form Controls

Source: https://junglewise.ai/threats/cve-2026-124929-information-disclosure-in-the-layout-form-controls-component  
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-2026-124929 · Severity: info · Published 2026-11-10

Firefox's form control rendering component contains an information disclosure vulnerability that could expose sensitive data to a web page. The issue was fixed in Firefox 160 and Firefox ESR 153.7. Users running older versions should update immediately to close this information exposure vector.

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

## Quick answers

**Is CVE-2026-124929 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124929 being exploited in the wild.

**How severe is CVE-2026-124929?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** Mozilla Firefox before 160; Mozilla Firefox ESR before 153.7.

**Is there a fix for CVE-2026-124929?** Yes: fixed in Firefox 160, Firefox ESR 153.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-124929 attacked?** It is in a web application.

**Am I affected by CVE-2026-124929?** Check whether you run Mozilla Firefox or Mozilla Firefox ESR 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, Firefox ESR 153.7

## Technical details

The vulnerability is an information disclosure flaw in the Layout: Form Controls component affecting Firefox browser rendering. The attack vector and specific preconditions are not detailed in the accessible portions of the advisory, but the fix is confirmed in Firefox 160 and Firefox ESR 153.7.

## Affected products

- Mozilla Firefox before 160
- Mozilla Firefox ESR before 153.7

## Timeline

- 2026-11-10: disclosed

## References

- [https://bugzilla.mozilla.org/show_bug.cgi?id=2080889](https://bugzilla.mozilla.org/show_bug.cgi?id=2080889)
- [https://www.mozilla.org/security/advisories/mfsa2026-125/](https://www.mozilla.org/security/advisories/mfsa2026-125/)

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