CVE-2026-24688
MEDIUMPypdf < 6.6.2 - Infinite Loop
Title source: ruleDescription
pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.
Exploits (1)
References (4)
Scores
CVSS v3
4.3
EPSS
0.0001
EPSS Percentile
1.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Classification
CWE
CWE-835
Status
published
Affected Products (2)
pypdf_project/pypdf
< 6.6.2
pypi/pypdf
< 6.6.2PyPI
Timeline
Published
Jan 27, 2026
Tracked Since
Feb 18, 2026