How many CVEs have patched _read1?

1 published CVEs changed _read1 in python/cpython, in 9 distinct patches totalling 44 changed lines, between 2026 and 2026.

What is the latest CVE that changed _read1?

CVE-2026-15310 (zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits), published 2026-08-25, changed lines 1114 to 1145 of Lib/zipfile/__init__.py.

How does _read1 compare to the rest of python/cpython?

python/cpython has 118 CVEs with a located fix in total; 1 of them changed _read1.

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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_read1

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Patched Functions
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Cpython
_read1

_read1 in python/cpython: Patched by 1 CVEs

python/cpython

Function

2 files

_read1

Name: _read1 in python/cpython: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

Defined in 2 files

Last patched August 25, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

_read1 in python/cpython was changed by 1 published CVE fixes in 2026, in 9 distinct patches that added or removed 44 lines in total.

The name occurs in 2 files: Lib/zipfile.py, Lib/zipfile/__init__.py.

python/cpython has 118 CVEs with a located fix in total, so 1% 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 _read1, newest first, with the lines each fix touched.

zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits
CVE-2026-15310 · Lib/zipfile/__init__.py · lines 1114–1145 · +19 −3 in 2 hunks
Low · CVSS 2.1
EPSS 0.5%2026-08-25
zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits
CVE-2026-15310 · Lib/zipfile.py · lines 1060–1091 · +19 −3 in 2 hunks
Low · CVSS 2.1
EPSS 0.5%2026-08-25

Get an alert when the next CVE fix lands in python/cpython, with the patched functions.

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Other functions in these files

Functions in the same files that CVE fixes also changed.

1_RealGetContentsLib/zipfile.py2 CVEs · 6 patches2024 to 2025
2_RealGetContentsLib/zipfile/__init__.py2 CVEs · 4 patches2024 to 2025
3decompressLib/zipfile/__init__.py1 CVEs · 5 patches2026
4_decompressor_needs_inputLib/zipfile/__init__.py1 CVEs · 5 patches2026
5_EndRecDataLib/zipfile/__init__.py1 CVEs · 4 patches2025
6_extract_memberLib/zipfile/__init__.py1 CVEs · 4 patches2026
7is_zipfileLib/zipfile/__init__.py1 CVEs · 4 patches2025
8_EndRecData64Lib/zipfile/__init__.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 _read1.

How many CVEs have patched _read1?: 1 published CVEs changed _read1 in python/cpython, in 9 distinct patches totalling 44 changed lines, between 2026 and 2026.
What is the latest CVE that changed _read1?: CVE-2026-15310 (zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits), published 2026-08-25, changed lines 1114 to 1145 of Lib/zipfile/__init__.py.
How does _read1 compare to the rest of python/cpython?: python/cpython has 118 CVEs with a located fix in total; 1 of them changed _read1.
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/zipfile.py on GitHub (opens in a new tab)
Lib/zipfile/__init__.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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