How many CVEs have patched realpath?

5 published CVEs changed realpath in python/cpython, in 1 distinct patches totalling 115 changed lines, between 2025 and 2025.

What is the latest CVE that changed realpath?

CVE-2024-12718 (Bypass extraction filter to modify file metadata outside extraction directory), published 2025-06-03, changed lines 604 to 751 of Lib/ntpath.py.

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

python/cpython has 118 CVEs with a located fix in total; 5 of them changed realpath.

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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Realpath

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Patched Functions
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Realpath

realpath in python/cpython: Patched by 5 CVEs

python/cpython

Function

realpath

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

Lib/ntpath.py

Last patched June 3, 2025

CVEs

That changed this function

Distinct patches

Backports counted once

115

Lines changed

Added plus removed

2025

Years

By CVE publication date

Overview

realpath in python/cpython was changed by 5 published CVE fixes in 2025, in 1 distinct patches that added or removed 115 lines in total.

python/cpython has 118 CVEs with a located fix in total, so 4% of them touched this function.

CVEs that patched it

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

On this page

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

Bypass extraction filter to modify file metadata outside extraction directory
CVE-2024-12718 · lines 604–751 · +16 −7 in 2 hunks
Medium · CVSS 5.3
EPSS 0.8%2025-06-03
Tarfile extracts filtered members when errorlevel=0
CVE-2025-4435 · lines 604–751 · +16 −7 in 2 hunks
High · CVSS 7.5
EPSS 0.6%2025-06-03
Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory
CVE-2025-4138 · lines 604–751 · +16 −7 in 2 hunks
High · CVSS 7.5
EPSS 1.4%2025-06-03
Extraction filter bypass for linking outside extraction directory
CVE-2025-4330 · lines 604–751 · +16 −7 in 2 hunks
High · CVSS 7.5
EPSS 0.9%2025-06-03
Arbitrary writes via tarfile realpath overflow
CVE-2025-4517 · lines 604–751 · +16 −7 in 2 hunks
Critical · CVSS 9.4
EPSS 1.4%2025-06-03

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Other functions in these files

Functions in the same file that CVE fixes also changed.

1_get_bothsepsLib/ntpath.py5 CVEs · 1 patches2025
2_getfinalpathname_nonstrictLib/ntpath.py5 CVEs · 1 patches2025
3_readlink_deepLib/ntpath.py5 CVEs · 1 patches2025
4expanduserLib/ntpath.py1 CVEs · 4 patches2025
5expandvarsLib/ntpath.py1 CVEs · 4 patches2025

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 realpath.

How many CVEs have patched realpath?: 5 published CVEs changed realpath in python/cpython, in 1 distinct patches totalling 115 changed lines, between 2025 and 2025.
What is the latest CVE that changed realpath?: CVE-2024-12718 (Bypass extraction filter to modify file metadata outside extraction directory), published 2025-06-03, changed lines 604 to 751 of Lib/ntpath.py.
How does realpath compare to the rest of python/cpython?: python/cpython has 118 CVEs with a located fix in total; 5 of them changed realpath.
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/ntpath.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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