CVE-2026-109747

7.3High

Published 13 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

7.3High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: Limited impact
Weakness: CWE-451

Impact

Remote attackers can spoof or manipulate address bar contents without authentication to mislead users. This facilitates phishing or interface spoofing attacks.

Root cause

A user interface presentation flaw (CWE-451) in the Address Bar component fails to accurately reflect the true origin or URL.

Affected systems

Firefox versions prior to 158 and Thunderbird versions prior to 158.

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Fix & remediation

Upgrade to Firefox 158 and Thunderbird 158 or later. No interim workaround is documented; update the software directly.

shell

$ sudo apt-get update && sudo apt-get install --only-upgrade firefox thunderbird

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Other issue in the Address Bar component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109747