Medium 6.6Published Oct 22, 2025

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

Updated under an hour ago (Oct 26, 2026, 11:25 PM ET)

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It affects py-pdf pypdf and 1 other product. Add what you run to find out whether that includes you.

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Every CVE for py-pdf pypdf

Exploited in the last 30 days

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.

CVSS: 6.6 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-409
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 23, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

py-pdf pypdf py_pdf:pypdf (from the name)	before 6.1.3	CNA record
pypdf_project pypdf pypdf_project:pypdf	before 6.1.3	NVD

References

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j	x-refsource-confirm, patch, vendor-advisory
https://github.com/py-pdf/pypdf/pull/3502	x-refsource-misc, patch
https://github.com/py-pdf/pypdf/commit/e51d07807ffcdaf18077b9486dadb3dc05b368da	x-refsource-misc, patch
https://github.com/py-pdf/pypdf/releases/tag/6.1.3	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.