CVE-2023-24329

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.

Published: Feb 17, 2023
Updated: Nov 4, 2025
CVE: CVE-2023-24329
Severity: High
Exploit:

CVSS v3:

Severity: High
Score: 7.5
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CWEs:

CWE-20

Affected Software
References

Software	From	Fixed in
python / python	3.10.0	3.10.12
python / python	3.9.0	3.9.17
python / python	3.8.0	3.8.17
python / python	-	3.7.17
fedoraproject / fedora	36	36.x
fedoraproject / fedora	37	37.x
fedoraproject / fedora	38	38.x
python / python	3.11.0	3.11.4

https://github.com/python/cpython/issues/102153
https://github.com/python/cpython/pull/99421
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@lists.fedoraproject.org/message/6PEVICI7YNGGMSL3UCMWGE66QFLATH72/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSL6NSOAXWBJJ67XPLSSC74MNKZF3BBO/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EM2XLZSTXG44TMFXF4E6VTGKR2MQCW3G/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F2NY75GFDZ5T6YPN44D3VMFT5SUVTOTG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GR5US3BYILYJ4SKBV6YBNPRUBAL5P2CN/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/H23OSKC6UG6IWOQAUPW74YUHWRWVXJP7/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JZTLGV2HYFF4AMYJL25VDIGAIHCU7UPA/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LWC4WGXER5P6Q75RFGL7QUTPP3N5JR7T/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MZEHSXSCMA4WWQKXT6QV7AAR6SWNZ2VP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O5SP4RT3RRS434ZS2HQKQJ3VZW7YPKYR/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OHHJHJRLEF3TDT2K3676CAUVRDD4CCMR/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEUN6T22UJFXR7J5F6UUHCXXPKJ2DVHI/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PURM5CFDABEWAIWZFD2MQ7ZJGCPYSQ44/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Q3J5N24ECS4B6MJDRO6UAYU6GPLYBDCL/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRQHN7RWJQJHYP6E5EKESOYP5VDSHZG4/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RA2MBEEES6L46OD64OBSVUUMGKNGMOWW/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T4IDB5OAR5Y4UK3HLMZBW4WEL2B7YFMJ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TZH26JGNZ5XYPZ5SAU3NKSBSPRE5OHTG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U2MZOJYGFCB5PPT6AKMAU72N7QOYWLBP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UONZWLB4QVLQIY5CPDLEUEKH6WX4VQMC/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTOAUJNDWZDRWVSXJ354AYZYKRMT56HU/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PEVICI7YNGGMSL3UCMWGE66QFLATH72/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSL6NSOAXWBJJ67XPLSSC74MNKZF3BBO/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EM2XLZSTXG44TMFXF4E6VTGKR2MQCW3G/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F2NY75GFDZ5T6YPN44D3VMFT5SUVTOTG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GR5US3BYILYJ4SKBV6YBNPRUBAL5P2CN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H23OSKC6UG6IWOQAUPW74YUHWRWVXJP7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZTLGV2HYFF4AMYJL25VDIGAIHCU7UPA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWC4WGXER5P6Q75RFGL7QUTPP3N5JR7T/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZEHSXSCMA4WWQKXT6QV7AAR6SWNZ2VP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O5SP4RT3RRS434ZS2HQKQJ3VZW7YPKYR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OHHJHJRLEF3TDT2K3676CAUVRDD4CCMR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEUN6T22UJFXR7J5F6UUHCXXPKJ2DVHI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PURM5CFDABEWAIWZFD2MQ7ZJGCPYSQ44/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q3J5N24ECS4B6MJDRO6UAYU6GPLYBDCL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRQHN7RWJQJHYP6E5EKESOYP5VDSHZG4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RA2MBEEES6L46OD64OBSVUUMGKNGMOWW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4IDB5OAR5Y4UK3HLMZBW4WEL2B7YFMJ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZH26JGNZ5XYPZ5SAU3NKSBSPRE5OHTG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U2MZOJYGFCB5PPT6AKMAU72N7QOYWLBP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UONZWLB4QVLQIY5CPDLEUEKH6WX4VQMC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WTOAUJNDWZDRWVSXJ354AYZYKRMT56HU/
https://pointernull.com/security/python-url-parse-problem.html
https://security.netapp.com/advisory/ntap-20230324-0004/
https://www.kb.cert.org/vuls/id/127587

Vulnerability Database

CVE-2023-24329

Deep Security Visibility Without the Complexity