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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jfx9-29x2-rv3j pypdf can exhaust RAM via manipulated LZWDecode streams
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 22 Oct 2025 21:45:00 +0000

Type Values Removed Values Added
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 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.
Title pypdf manipulated LZWDecode streams can exhaust RAM
Weaknesses CWE-409
References
Metrics cvssV4_0

{'score': 6.6, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-10-22T21:36:56.788Z

Reserved: 2025-10-20T19:41:22.739Z

Link: CVE-2025-62708

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2025-10-22T22:15:35.880

Modified: 2025-10-22T22:15:35.880

Link: CVE-2025-62708

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.