How many CVEs have patched urlsplit?

4 published CVEs changed urlsplit in python/cpython, in 18 distinct patches totalling 15 changed lines, between 2019 and 2025.

What is the latest CVE that changed urlsplit?

CVE-2025-0938 (URL parser allowed square brackets in domain names), published 2025-01-31, changed lines 525 of Lib/urllib/parse.py.

How does urlsplit compare to the rest of python/cpython?

python/cpython has 118 CVEs with a located fix in total; 4 of them changed urlsplit.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Patched Functions
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Urlsplit

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Patched Functions
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Cpython
Urlsplit

urlsplit in python/cpython: Patched by 4 CVEs

python/cpython

Function

2 files

urlsplit

Name: urlsplit in python/cpython: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

Defined in 2 files

Last patched January 31, 2025

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2019–2025

Years

By CVE publication date

Overview

urlsplit in python/cpython was changed by 4 published CVE fixes between 2019 and 2025, in 18 distinct patches that added or removed 15 lines in total.

The name occurs in 2 files: Lib/urllib/parse.py, Lib/urlparse.py.

python/cpython has 118 CVEs with a located fix in total, so 3% of them touched this function.

On this page

Overview
CVEs that patched it
Other functions in these files
Other hotspots in the repository
FAQ
References

CVEs that patched it

Every published CVE whose fix changed urlsplit, newest first, with the lines each fix touched.

URL parser allowed square brackets in domain names
CVE-2025-0938 · Lib/urllib/parse.py · line 525 · +1 −2
Medium · CVSS 6.3
EPSS 1.6%2025-01-31
CVE-2024-11168
CVE-2024-11168 · Lib/urllib/parse.py · lines 481–488 · +3 −1
Medium · CVSS 6.3
EPSS 0.7%2024-11-12
urlparse does not correctly handle schemes
CVE-2023-24329 · Lib/urllib/parse.py · lines 475–478 · +4 −0
High · CVSS 7.5
EPSS 20.5%2023-02-17
urlsplit does not handle NFKC normalization
CVE-2019-9636 · Lib/urllib/parse.py · lines 374–398 · +2 −0 in 2 hunks
Critical · CVSS 9.8
EPSS 7.7%2019-03-08
urlsplit does not handle NFKC normalization
CVE-2019-9636 · Lib/urlparse.py · lines 211–235 · +2 −0 in 2 hunks
Critical · CVSS 9.8
EPSS 7.7%2019-03-08

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Other functions in these files

Functions in the same files that CVE fixes also changed.

1_checknetlocLib/urllib/parse.py2 CVEs · 7 patches2019
2_checknetlocLib/urlparse.py2 CVEs · 2 patches2019
3_check_bracketed_hostLib/urllib/parse.py1 CVEs · 5 patches2024
4_check_bracketed_netlocLib/urllib/parse.py1 CVEs · 5 patches2025
5_urlsplitLib/urllib/parse.py1 CVEs · 2 patches2025
6parse_qsLib/urllib/parse.py1 CVEs · 1 patches2021
7parse_qslLib/urllib/parse.py1 CVEs · 1 patches2021

Other hotspots in the repository

Functions in python/cpython changed by the most CVE fixes.

makelink_with_filter9 CVEs · Lib/tarfile.py _get_filtered_attrs7 CVEs · Lib/tarfile.py extract6 CVEs · Lib/tarfile.py _get_sep5 CVEs · Lib/posixpath.py _readlink_deep5 CVEs · Lib/ntpath.py _get_bothseps5 CVEs · Lib/ntpath.py

All patched functions in python/cpython

Frequently asked questions

Common questions about CVE fixes to urlsplit.

How many CVEs have patched urlsplit?: 4 published CVEs changed urlsplit in python/cpython, in 18 distinct patches totalling 15 changed lines, between 2019 and 2025.
What is the latest CVE that changed urlsplit?: CVE-2025-0938 (URL parser allowed square brackets in domain names), published 2025-01-31, changed lines 525 of Lib/urllib/parse.py.
How does urlsplit compare to the rest of python/cpython?: python/cpython has 118 CVEs with a located fix in total; 4 of them changed urlsplit.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

Lib/urllib/parse.py on GitHub (opens in a new tab)
Lib/urlparse.py on GitHub (opens in a new tab)
All patched functions in python/cpython
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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