CVE-2026-16403CWE-451

CVE-2026-16403

Medium · published July 21, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
9.1
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00198 · 9.1th percentile
Weakness
CWE-451 · User Interface (UI) Misrepresentation of Critical Information
Published
2026-07-21T17:17Z
Affected products (2)
ProductVersionsFixed in
mozilla/firefox< 153.0.0153.0.0
mozilla/thunderbird< 153.0153.0
References (3)
https://bugzilla.mozilla.org/show_bug.cgi?id=1972244 · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-68/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-71/ · [email protected]
EPSS history
Timeline
  • 21 JUL 12:38Z
    Spoofing issue in the Address Bar component
    cvelistv5