How many CVEs have patched _decompress_with_limit?

4 published CVEs changed _decompress_with_limit in py-pdf/pypdf, in 6 distinct patches totalling 18 changed lines, between 2025 and 2026.

What is the latest CVE that changed _decompress_with_limit?

CVE-2026-27026 (pypdf possibly has long runtimes for malformed FlateDecode streams), published 2026-02-20, changed lines 77 to 80 of pypdf/filters.py.

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

py-pdf/pypdf has 52 CVEs with a located fix in total; 4 of them changed _decompress_with_limit.

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

_decompress_with_limit

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

pypdf/filters.py

Last patched February 20, 2026

4

CVEs

That changed this function

6

Distinct patches

Backports counted once

18

Lines changed

Added plus removed

2025–2026

Years

By CVE publication date

Overview

_decompress_with_limit in py-pdf/pypdf was changed by 4 published CVE fixes between 2025 and 2026, in 6 distinct patches that added or removed 18 lines in total.

py-pdf/pypdf has 52 CVEs with a located fix in total, so 8% of them touched this function.

CVEs that patched it

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

pypdf possibly has long runtimes for malformed FlateDecode streams
CVE-2026-27026 · lines 77–80 · +3 −0
Medium · CVSS 6.9
EPSS 0.2%2026-02-20
pypdf manipulated LZWDecode streams can exhaust RAM
CVE-2025-66019 · line 74 · +1 −1
Medium · CVSS 6.6
EPSS 0.4%2025-11-25
pypdf manipulated LZWDecode streams can exhaust RAM
CVE-2025-62708 · line 74 · +1 −0
Medium · CVSS 6.6
EPSS 0.4%2025-10-22
pypdf's Manipulated FlateDecode streams can exhaust RAM
CVE-2025-55197 · lines 72–83 · +12 −0
Medium · CVSS 6.6
EPSS 0.5%2025-08-13

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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 decompress3 CVEs · pypdf/filters.py _get_outline3 CVEs · pypdf/_doc_common.py _flatten3 CVEs · pypdf/_doc_common.py _extract_text3 CVEs · pypdf/_page.py extract_xform_text3 CVEs · pypdf/_page.py

All patched functions in py-pdf/pypdf

Frequently asked questions

Common questions about CVE fixes to _decompress_with_limit.

How many CVEs have patched _decompress_with_limit?: 4 published CVEs changed _decompress_with_limit in py-pdf/pypdf, in 6 distinct patches totalling 18 changed lines, between 2025 and 2026.
What is the latest CVE that changed _decompress_with_limit?: CVE-2026-27026 (pypdf possibly has long runtimes for malformed FlateDecode streams), published 2026-02-20, changed lines 77 to 80 of pypdf/filters.py.
How does _decompress_with_limit compare to the rest of py-pdf/pypdf?: py-pdf/pypdf has 52 CVEs with a located fix in total; 4 of them changed _decompress_with_limit.
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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