CVE-2025-62708 MEDIUM

CVE-2025-62708: pypdf manipulated LZWDecode streams can exhaust RAM

Vendor Py-Pdf
Product pypdf
Weakness CWE-409
Published October 22, 2025
Last update October 23, 2025
View on NVD All CVEs

CVSS base score

6.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 22, 2025 CVE published
October 23, 2025 Record updated