CVE-2026-18503 in Python

Resumen

por MITRE • 2026-08-10

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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• Responsable: PSF
• Reservar: 2026-07-31
• Divulgación: 2026-08-10
• Moderación: aceptado
• Artículo: VDB-387585
• CPE: listo
• CWE: CWE-1236 (confirmado)
• CVSS: 4.3 (VulDB)
• EPSS: 0.00000
• KEV: no
• Actividades: muy bajo
• Sector: Insurance, Pharma, ...

Fuentes

• 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/