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CVE-2026-18503

Updated on 10 Aug 2026

Severity

2.4 Low severity

Details

CVSS score
2.4
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

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().

Details

Affected product:
Alpine Linux 3.23 , Alpine Linux 3.24 , Debian 10 , Debian 11 , Debian 12 , Debian 13 , EL 10 , EL 7 , EL 8 , EL 9 , Ubuntu 16.04 , Ubuntu 18.04 , Ubuntu 20.04 , Ubuntu 22.04 , Ubuntu 24.04
Affected packages:
alt-python311 @ 3.11 (+130 more)