How many CVEs have patched used_before?

1 published CVEs changed used_before in py-pdf/pypdf, in 2 distinct patches totalling 4 changed lines, between 2026 and 2026.

What is the latest CVE that changed used_before?

CVE-2026-41168 (pypdf has possible long runtimes for wrong size values in cross-reference and object streams), published 2026-04-22, changed lines 1135 to 1136 of pypdf/_reader.py.

How does used_before compare to the rest of py-pdf/pypdf?

py-pdf/pypdf has 52 CVEs with a located fix in total; 1 of them changed used_before.

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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Used_before

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Patched Functions
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Used_before

used_before in py-pdf/pypdf: Patched by 1 CVEs

py-pdf/pypdf

Function

used_before

Name: used_before in py-pdf/pypdf: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

pypdf/_reader.py

Last patched April 22, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

used_before in py-pdf/pypdf was changed by 1 published CVE fixes in 2026, in 2 distinct patches that added or removed 4 lines in total.

py-pdf/pypdf has 52 CVEs with a located fix in total, so 2% of them touched this function.

CVEs that patched it

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

pypdf has possible long runtimes for wrong size values in cross-reference and object streams
CVE-2026-41168 · lines 1135–1136 · +2 −2
Medium · CVSS 6.9
EPSS 0.5%2026-04-22

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Other functions in these files

Functions in the same file that CVE fixes also changed.

1_sanitize_pdf15_xref_stream_index_pairspypdf/_reader.py2 CVEs · 4 patches2026
2_find_pdf_objectspypdf/_reader.py2 CVEs · 2 patches2026
3__init__pypdf/_reader.py2 CVEs · 2 patches2026
4root_objectpypdf/_reader.py2 CVEs · 2 patches2026
5_rebuild_xref_tablepypdf/_reader.py1 CVEs · 2 patches2026
6_get_object_from_streampypdf/_reader.py1 CVEs · 2 patches2026
7_load_recovery_cachepypdf/_reader.py1 CVEs · 2 patches2026
8_read_standard_xref_tablepypdf/_reader.py1 CVEs · 2 patches2026

Other hotspots in the repository

Functions in py-pdf/pypdf changed by the most CVE fixes.

decode5 CVEs · pypdf/filters.py _decompress_with_limit4 CVEs · pypdf/filters.py decompress3 CVEs · pypdf/filters.py _get_outline3 CVEs · pypdf/_doc_common.py _flatten3 CVEs · pypdf/_doc_common.py _extract_text3 CVEs · pypdf/_page.py

All patched functions in py-pdf/pypdf

Frequently asked questions

Common questions about CVE fixes to used_before.

How many CVEs have patched used_before?: 1 published CVEs changed used_before in py-pdf/pypdf, in 2 distinct patches totalling 4 changed lines, between 2026 and 2026.
What is the latest CVE that changed used_before?: CVE-2026-41168 (pypdf has possible long runtimes for wrong size values in cross-reference and object streams), published 2026-04-22, changed lines 1135 to 1136 of pypdf/_reader.py.
How does used_before compare to the rest of py-pdf/pypdf?: py-pdf/pypdf has 52 CVEs with a located fix in total; 1 of them changed used_before.
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

pypdf/_reader.py on GitHub (opens in a new tab)
All patched functions in py-pdf/pypdf
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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