CVE-2026-4690 in Firefox

Sumário

de MITRE • 24/03/2026

Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

• Responsável: Mozilla
• Reservar: 24/03/2026
• Divulgação: 24/03/2026
• Moderação: aceite
• Entrada: VDB-352739
• CPE: pronto
• CWE: CWE-190 (confirmado)
• CVSS: 8.6 (NVD)
• EPSS: 0.00773
• KEV: não
• Atividades: muito baixo
• Sector: Industry, Chemical, ...

Fontes

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-4690
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4690
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-4690/