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Δ / VULNERABILITY RECORD

CVE-2026-18503.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSUnscoredNo severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Aug 23, 2026

Disclosure summary

Super-linear CPU usage for unbounded input to csv.Sniffer.sniff()

Source-reported weakness categories

CWE-1176

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2026-Aug

Open original source · Updated Aug 23, 2026

Super-linear CPU usage for unbounded input to csv.Sniffer.sniff()

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

VendorProduct / associationVersion / bounds
Microsoft update guideazl3 python3 3.12.9-14 on Azure Linux 3.0 (MSRC status code 3)

Vendor remediation references

  • CBL-Mariner Releases · build 3.12.14-1 · product IDs 21694-17084
  • Vendor guidance · product IDs 21694-17084

Original records & references

PUBLISHED 2026-08-14T15:05:56-04:00
MODIFIED 2026-08-23T10:57:51-04:00
INGESTED 2026-10-08T12:35:08-04:00