CVE-2026-16403: Vulnerability in Mozilla Firefox
CVE-2026-16403 is a spoofing vulnerability in the Address Bar component of Mozilla Firefox. This issue could allow an attacker to mislead users by displaying deceptive information in the browser's address bar. The vulnerability was fixed in Firefox version 153.
AI Analysis
Technical Summary
CVE-2026-16403 is a spoofing vulnerability affecting the Address Bar component of Mozilla Firefox. The flaw could enable attackers to present misleading or deceptive URLs to users, potentially facilitating phishing or other social engineering attacks. Mozilla addressed and fixed this vulnerability in Firefox 153. No CVSS score is provided for this issue.
Potential Impact
The vulnerability allows spoofing in the Firefox address bar, which can lead to users being deceived about the actual website they are visiting. This can facilitate phishing attacks or other forms of user deception. The impact is classified as low by Mozilla.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 153. Users and administrators should update to Firefox 153 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
CVE-2026-16403: Vulnerability in Mozilla Firefox
Description
CVE-2026-16403 is a spoofing vulnerability in the Address Bar component of Mozilla Firefox. This issue could allow an attacker to mislead users by displaying deceptive information in the browser's address bar. The vulnerability was fixed in Firefox version 153.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16403 is a spoofing vulnerability affecting the Address Bar component of Mozilla Firefox. The flaw could enable attackers to present misleading or deceptive URLs to users, potentially facilitating phishing or other social engineering attacks. Mozilla addressed and fixed this vulnerability in Firefox 153. No CVSS score is provided for this issue.
Potential Impact
The vulnerability allows spoofing in the Firefox address bar, which can lead to users being deceived about the actual website they are visiting. This can facilitate phishing attacks or other forms of user deception. The impact is classified as low by Mozilla.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 153. Users and administrators should update to Firefox 153 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:57:37.813Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cc22a4a8d5989262956
Added to database: 07/21/2026, 12:57:38 UTC
Last enriched: 07/21/2026, 13:13:53 UTC
Last updated: 07/21/2026, 13:13:53 UTC
Views: 2
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