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.

CVSS v3.1 NVD

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

EPSS

20.46% chance of exploitation in the next 30 days, 97th percentile

Published

2023-02-17

Updated

2026-10-14

Proof-of-concept exploits (3)

• H4R335HR/CVE-2023-24329-PoC0★ · 2023-08-17
• Pandante-Central/CVE-2023-24329-codeql-test0★ · 2023-08-18
• PenTestMano/CVE-2023-24329-Exploit0★ · 2023-10-13

Security advisories

• https://pointernull.com/security/python-url-parse-problem.html
• https://security.netapp.com/advisory/ntap-20230324-0004
• python/cpython/issues/102153
• https://www.kb.cert.org/vuls/id/127587

References

• CVE Record
• NVD entry

Related

• CVE-2011-2523
• CVE-2011-5330
• CVE-2014-0160
• CVE-2025-55182