CVE-2026-48735

MEDIUM

pypdf: Manipulated XMP metadata streams can exhaust RAM

Title source: cna
STIX 2.1

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements. This vulnerability is fixed in 6.12.1.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/py-pdf/pypdf/pull/3796
X_Refsource_Misc x_refsource_misc
https://github.com/py-pdf/pypdf/releases/tag/6.12.1

Scores

CVSS v3 5.5
EPSS 0.0013
EPSS Percentile 2.9%
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-770
Status published
Products (2)
py-pdf/pypdf < 6.12.1
pypdf_project/pypdf < 6.12.1
Published May 28, 2026
Tracked Since May 28, 2026