Inefficient Regular Expression Complexity Affecting python3 package, versions *


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-RHEL10-PYTHON3-18992353
  • published20 Aug 2026
  • disclosed10 Aug 2026

Introduced: 10 Aug 2026

NewCVE-2026-18503  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 python3.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3 package and not the python3 package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

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().

CVSS Base Scores

version 3.1