Description
pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3.
References (4)
Core 4
Core References
Patch, Vendor Advisory x_refsource_confirm
https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j
Patch x_refsource_misc
https://github.com/py-pdf/pypdf/pull/3502
Patch x_refsource_misc
https://github.com/py-pdf/pypdf/commit/e51d07807ffcdaf18077b9486dadb3dc05b368da
Release Notes x_refsource_misc
https://github.com/py-pdf/pypdf/releases/tag/6.1.3
Scores
CVSS v3
7.5
EPSS
0.0007
EPSS Percentile
21.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-409
Status
published
Products (2)
pypdf_project/pypdf
< 6.1.3
pypi/pypdf
0 - 6.1.3PyPI
Published
Oct 22, 2025
Tracked Since
Feb 18, 2026