CVE-2026-48155

MEDIUM

pypdf: Possible large memory usage for large offsets for layout mode text

Title source: cna
STIX 2.1

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/py-pdf/pypdf/pull/3790
X_Refsource_Misc x_refsource_misc
https://github.com/py-pdf/pypdf/releases/tag/6.12.0

Scores

CVSS v3 5.5
EPSS 0.0013
EPSS Percentile 2.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (3)
py-pdf/pypdf < 6.12.0
pypdf_project/pypdf < 6.12.0
pypi/pypdf 0 - 6.12.0PyPI
Published May 28, 2026
Tracked Since May 28, 2026