Bug 2513510 (CVE-2026-18503) - CVE-2026-18503 python: Python: Denial of Service via super-linear regular expression work in csv.Sniffer.sniff()
Summary: CVE-2026-18503 python: Python: Denial of Service via super-linear regular exp...
Keywords:
Status: NEW
Alias: CVE-2026-18503
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-10 14:11 UTC by OSIDB Bzimport
Modified: 2026-08-20 08:16 UTC (History)
195 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-10 14:11:32 UTC 
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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