Spoofing Vulnerability in Firefox Address Bar Component
CVE-2026-16403

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 21 July 2026

What is CVE-2026-16403?

A spoofing vulnerability was identified in the Address Bar component of Firefox, allowing attackers to potentially mislead users into thinking they are visiting a legitimate website. This issue could compromise user trust and secure browsing practices. Mozilla has addressed this flaw in Firefox version 153, enhancing user protection against such deceptive tactics.

Affected Version(s)

Firefox 153

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1972244

https://www.mozilla.org/security/advisories/mfsa2026-68/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Jul 21, 2026
Vulnerability Reserved
Jul 20, 2026

Credit

Renwa

CVE-2026-16403 Data

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