CVE-2026-16403

Spoofing issue in the Address Bar component

State: Published
Severity: 6.5 Medium
Published: Jul 21, 2026
Updated: Jul 22, 2026
Reserved: Jul 20, 2026

Description

Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N	CISA-ADP

Weaknesses

CWE-451 User Interface (UI) Misrepresentation of Critical Information

Affected Products

Product	Versions
FirefoxMozilla	153 and laterNot affected
ThunderbirdMozilla	153 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1972244
https://www.mozilla.org/security/advisories/mfsa2026-68/
https://www.mozilla.org/security/advisories/mfsa2026-71/

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