CVE-2026-2766 in Firefox

Sumário

de VulDB • 30/06/2026

Use-after-free no componente JIT do Motor de JavaScript. Esta vulnerabilidade afeta o Firefox < 148, o Firefox ESR < 140.8, o Thunderbird < 148 e o Thunderbird < 140.8.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

• Responsável: Mozilla
• Reservar: 19/02/2026
• Divulgação: 24/02/2026
• Moderação: aceite
• Entrada: VDB-347555
• CPE: pronto
• CWE: CWE-416 (confirmado)
• CVSS: 9.8 (NVD)
• EPSS: 0.00469
• KEV: não
• Atividades: muito baixo
• Sector: Chemical, Hospital, ...

Fontes

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-2766
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2766
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-2766/