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 an infinite loop. This requires parsing the content stream of a page which has an inline image using the DCTDecode filter. This has been fixed in pypdf version 6.1.3.
Scores
CVSS v3
7.5
EPSS
0.0005
EPSS Percentile
14.2%
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-834
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