# CVE-2026-124936: Firefox address bar domain highlighting spoofing

Source: https://junglewise.ai/threats/cve-2026-124936-spoofing-issue-in-the-address-bar-component-this-vulnerability  
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-2026-124936 · Severity: info · Published 2026-11-10

Firefox's address bar stopped highlighting the main domain portion of URLs starting in version 156, making it easier for attackers to use visual spoofing to trick users into visiting malicious websites. The domain highlighting is a security feature that helps users identify the legitimate website they are visiting by visually distinguishing it from the path and parameters. Without this distinction, users may be deceived by URLs that appear to direct them to one site when they actually lead elsewhere.

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

## Quick answers

**Is CVE-2026-124936 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124936 being exploited in the wild.

**How severe is CVE-2026-124936?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** Mozilla Firefox 156–159.

**Is there a fix for CVE-2026-124936?** Yes: fixed in Firefox 160. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-124936 attacked?** It is in a web application.

**Am I affected by CVE-2026-124936?** 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

A regression in Firefox 156 disabled the visual highlighting of domain names in the address bar, previously accomplished by rendering the domain in a different color (black) than the protocol and path (gray). This is a UI spoofing vulnerability affecting the address bar component; while the impact is primarily visual, it removes a user-facing security signal used to detect phishing and domain spoofing attacks. The issue was resolved in Firefox 160 by adjusting text opacity to restore the visual distinction.

## Affected products

- Mozilla Firefox 156–159

## Timeline

- 2026-11-10: disclosed

## References

- [https://bugzilla.mozilla.org/show_bug.cgi?id=2072573](https://bugzilla.mozilla.org/show_bug.cgi?id=2072573)
- [https://www.mozilla.org/security/advisories/mfsa2026-125/](https://www.mozilla.org/security/advisories/mfsa2026-125/)

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