CVE-2026-18503 in Python

Sumário

de MITRE • 10/08/2026

Attacker-controlled CSV samples can trigger super-linear regular-expression work during dialect sniffing and consume significant CPU when applications pass unbounded input to csv.Sniffer.sniff().

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• Responsável: PSF
• Reservar: 31/07/2026
• Divulgação: 10/08/2026
• Moderação: aceite
• Entrada: VDB-387585
• CPE: pronto
• CWE: CWE-1236 (confirmado)
• CVSS: 4.3 (VulDB)
• EPSS: 0.00000
• KEV: não
• Atividades: muito baixo
• Sector: Pharma, Chemical, ...

Fontes

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-18503
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18503
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-18503/