VULNERABILITY INTELLIGENCE
CVE-2026-18503
EPSS probability0.12%
CISA KEVNot currently listed
Published2026-08-10
Last modified2026-10-23
Description
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().
Weakness classification
- cna@python.org: CWE-1176