CVE-2026-18809 in Firefox

Summary

by MITRE • 08/04/2026

Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.

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• Responsible: Mozilla
• Reservation: 08/04/2026
• Disclosure: 08/04/2026
• Moderation: accepted
• Entry: VDB-385827
• CPE: ready
• CWE: CWE-200 (confirmed)
• CVSS: 5.3 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Education, Insurance, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-18809
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18809
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-18809/