High severity · published Oct 22, 2025
CVE-2025-62708
pypdf manipulated LZWDecode streams can exhaust RAM
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
pypdf · py-pdf
< 6.1.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-62708
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-62708
Patch
https://github.com/py-pdf/pypdf/commit/e51d07807ffcdaf18077b9486dadb3dc05b368da
Patch
https://github.com/py-pdf/pypdf/pull/3502
Release Notes
https://github.com/py-pdf/pypdf/releases/tag/6.1.3
Patch
https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j
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