How many CVEs have patched number2uppercase_letter?

2 published CVEs changed number2uppercase_letter in py-pdf/pypdf, in 4 distinct patches totalling 7 changed lines, between 2026 and 2026.

What is the latest CVE that changed number2uppercase_letter?

CVE-2026-103000 (pypdf: Possible large memory usage when retrieving alphabetical page labels), published 2026-09-30, changed lines 123 to 128 of pypdf/_page_labels.py.

How does number2uppercase_letter compare to the rest of py-pdf/pypdf?

py-pdf/pypdf has 52 CVEs with a located fix in total; 2 of them changed number2uppercase_letter.

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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py-pdf/pypdf

Function

number2uppercase_letter

Name: number2uppercase_letter in py-pdf/pypdf: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

pypdf/_page_labels.py

Last patched September 30, 2026

2

CVEs

That changed this function

4

Distinct patches

Backports counted once

7

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

number2uppercase_letter in py-pdf/pypdf was changed by 2 published CVE fixes in 2026, in 4 distinct patches that added or removed 7 lines in total.

py-pdf/pypdf has 52 CVEs with a located fix in total, so 4% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed number2uppercase_letter, newest first, with the lines each fix touched.

pypdf: Possible large memory usage when retrieving alphabetical page labels
CVE-2026-103000 · lines 123–128 · +4 −1
High · CVSS 8.7
EPSS 0.3%2026-09-30
pypdf: Possible large memory usage when retrieving Roman page labels
CVE-2026-102993 · line 118 · +1 −1
High · CVSS 8.7
EPSS 0.4%2026-09-30

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Other functions in these files

Functions in the same file that CVE fixes also changed.

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 number2uppercase_letter.

How many CVEs have patched number2uppercase_letter?: 2 published CVEs changed number2uppercase_letter in py-pdf/pypdf, in 4 distinct patches totalling 7 changed lines, between 2026 and 2026.
What is the latest CVE that changed number2uppercase_letter?: CVE-2026-103000 (pypdf: Possible large memory usage when retrieving alphabetical page labels), published 2026-09-30, changed lines 123 to 128 of pypdf/_page_labels.py.
How does number2uppercase_letter compare to the rest of py-pdf/pypdf?: py-pdf/pypdf has 52 CVEs with a located fix in total; 2 of them changed number2uppercase_letter.
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

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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