Spoofing Vulnerability Affecting Mozilla Firefox
CVE-2026-12323

5.4MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Vendor
CVE Published:
16 June 2026

What is CVE-2026-12323?

A spoofing vulnerability has been identified in the DOM: Core & HTML component of Mozilla Firefox, which could potentially allow attackers to impersonate legitimate users. This issue was addressed in Firefox version 152, ensuring enhanced security for users. It is advisable for users to upgrade to the latest version to mitigate any risk associated with this vulnerability. For further details, refer to the Mozilla security advisory and the Bugzilla entry.

Affected Version(s)

Firefox 152

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2035027
https://www.mozilla.org/security/advisories/mfsa2026-57/

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jody Ritonga
.