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CVE-2026-18503

🗓️ 10 Aug 2026 13:45:31Reported by PSFType 
cve
 cve
🔗 web.nvd.nist.gov👁 12 Views

CVE-2026-18503: Unbounded input to csv.Sniffer.sniff() causes super-linear CPU via regex work.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-18503
10 Aug 202613:45
attackerkb
cvelist
Cvelist
CVE-2026-18503 Super-linear CPU usage for unbounded input to csv.Sniffer.sniff()
10 Aug 202613:45
cvelist
euvd
EUVD
EUVD-2026-55630
10 Aug 202613:45
euvd
nvd
NVD
CVE-2026-18503
10 Aug 202614:17
nvd
osv
OSV
PSF-2026-35
10 Aug 202613:45
osv
vulnrichment
Vulnrichment
CVE-2026-18503 Super-linear CPU usage for unbounded input to csv.Sniffer.sniff()
10 Aug 202613:45
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "modules": [
      "csv"
    ],
    "product": "CPython",
    "repo": "https://github.com/python/cpython",
    "vendor": "Python Software Foundation",
    "versions": [
      {
        "version": "0",
        "lessThan": "3.13.15",
        "status": "affected",
        "versionType": "python"
      },
      {
        "version": "3.14.0",
        "lessThan": "3.14.7",
        "status": "affected",
        "versionType": "python"
      },
      {
        "version": "3.15.0a1",
        "lessThan": "3.15.0rc1",
        "status": "affected",
        "versionType": "python"
      }
    ]
  }
]

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10 Aug 2026 18:17Current
5.2Medium risk
Vulners AI Score5.2
CVSS 42.4
SSVC
12