CVE-2026-18503

2.4 Faible

Publiée le 10/08/2026 à 16:17 · Modifiée le 14/10/2026 à 03:17 · En attente d'analyse NVD · Source : cna@python.org

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().

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Produits concernés

Python Software Foundation CPython

Scores CVSS

Version	Score	Source	Vecteur
4.0	2.4 Faible	cna@python.org	`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`

Faiblesses (CWE)

CWE-1176

Références

https://github.com/python/cpython/commit/063d4555c94ef412c731527dbf30193327f2ee82
https://github.com/python/cpython/commit/476fb09cdb0d73e645849d98c610e7e5697ce7c9
https://github.com/python/cpython/commit/89f29c760c02774b099ddd6863268eb13fa3946a
https://github.com/python/cpython/commit/b09a67a20c464f8288c9f9a6b9c7082a74560024
https://github.com/python/cpython/commit/b30c7fa9edd921a118f286e9f90f560777fa693b
https://github.com/python/cpython/commit/fd78b565d7c326f96ae903ab945b47f35d829cf4
https://github.com/python/cpython/issues/98820
https://github.com/python/cpython/pull/153694
https://mail.python.org/archives/list/security-announce@python.org/thread/KQ7NBMCPAZJHRROQXJQE4GMXGLD5KHBS/

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories