# CVE-2026-124930: Mozilla Firefox information disclosure in Address Bar

Source: https://junglewise.ai/threats/cve-2026-124930-information-disclosure-in-the-address-bar-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-2026-124930 · Severity: info · Published 2026-11-10

Mozilla Firefox's Address Bar component, which displays website URLs and other navigation information to users, contains a flaw that can leak sensitive information. An attacker could exploit this to disclose data that should remain private to the user.

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-2026-124930 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124930 being exploited in the wild.

**How severe is CVE-2026-124930?** Informational severity, published 10 November 2026.

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

**Is there a fix for CVE-2026-124930?** 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-2026-124930 attacked?** It is in a web application.

**Am I affected by CVE-2026-124930?** 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

An information disclosure vulnerability exists in the Firefox Address Bar component. The specific attack vector and preconditions are not detailed in the available advisory content, but the vulnerability has been addressed in recent patched versions, indicating it required a code fix to resolve.

## Affected products

- Mozilla Firefox prior to 160
- Mozilla Firefox ESR prior to 153.7

## Timeline

- 2026-11-10: disclosed

## References

- [https://bugzilla.mozilla.org/show_bug.cgi?id=2082172](https://bugzilla.mozilla.org/show_bug.cgi?id=2082172)
- [https://www.mozilla.org/security/advisories/mfsa2026-125/](https://www.mozilla.org/security/advisories/mfsa2026-125/)

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