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Vulnerability record · CVE-2023-24329 · published 17 February 2023

CVE-2023-24329: Python improper input validation vulnerability

Python · Python

An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that starts with blank characters.

7.5 CVSS 3.1 High EPSS 20% · top 2.6% CWE-20 · Improper input validation
7.5CVSS 3.1 base score
20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
56References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that starts with blank characters.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/python/cpython/issues/102153 Issue Tracking
https://github.com/python/cpython/pull/99421 Patch
https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PEVICI7YNGGMSL3UCMWGE6
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSL6NSOAXWBJJ67XPLSSC74
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EM2XLZSTXG44TMFXF4E6VTG
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F2NY75GFDZ5T6YPN44D3VMF
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GR5US3BYILYJ4SKBV6YBNPR
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H23OSKC6UG6IWOQAUPW74YU
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZTLGV2HYFF4AMYJL25VDIG
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWC4WGXER5P6Q75RFGL7QUT
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZEHSXSCMA4WWQKXT6QV7AA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O5SP4RT3RRS434ZS2HQKQJ3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OHHJHJRLEF3TDT2K3676CAU
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEUN6T22UJFXR7J5F6UUHCX
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PURM5CFDABEWAIWZFD2MQ7Z
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q3J5N24ECS4B6MJDRO6UAYU
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRQHN7RWJQJHYP6E5EKESOY
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RA2MBEEES6L46OD64OBSVUU
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4IDB5OAR5Y4UK3HLMZBW4W
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZH26JGNZ5XYPZ5SAU3NKSB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U2MZOJYGFCB5PPT6AKMAU72
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UONZWLB4QVLQIY5CPDLEUEK
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WTOAUJNDWZDRWVSXJ354AYZ
https://pointernull.com/security/python-url-parse-problem.html ExploitMitigationTechnical DescriptionThird Party Advisory
https://security.netapp.com/advisory/ntap-20230324-0004/ Third Party Advisory
https://www.kb.cert.org/vuls/id/127587
https://github.com/python/cpython/issues/102153 Issue Tracking
https://github.com/python/cpython/pull/99421 Patch
https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html
https://lists.debian.org/debian-lts-announce/2024/11/msg00005.html
https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PEVICI7YNGGMSL3UCMWGE6
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSL6NSOAXWBJJ67XPLSSC74
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EM2XLZSTXG44TMFXF4E6VTG
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F2NY75GFDZ5T6YPN44D3VMF
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GR5US3BYILYJ4SKBV6YBNPR
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H23OSKC6UG6IWOQAUPW74YU
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZTLGV2HYFF4AMYJL25VDIG
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWC4WGXER5P6Q75RFGL7QUT

Track CVE-2023-24329 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Source: NIST National Vulnerability Database (record CVE-2023-24329), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.