CVE-2025-62708 — Improper Handling of Highly Compressed Data (Data Amplification) in Pypdf

CWE-409 — Improper Handling of Highly Compressed Data (Data Amplification)6 documents5 sources
Severity
6.6MEDIUMNVD
EPSS
0.1%
top 78.17%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Py-pdf PypdfPypdf Project PypdfDebian Pypdf
Timeline
PublishedOct 22

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

Affected Packages5 packages

▶CVEListV5py-pdf/pypdf< 6.1.3
▶debiandebian/pypdf< pypdf 6.9.0-1 (forky)
▶NVDpypdf_project/pypdf< 6.1.3
▶PyPIpypdf_project/pypdf< 6.1.3
▶Debianpypdf_project/pypdf< 6.9.0-1

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
pypdf can exhaust RAM via manipulated LZWDecode streams↗2025-10-22
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OSV
CVE-2025-62708: pypdf is a free and open-source pure-python PDF library↗2025-10-22
▶
OSV
pypdf can exhaust RAM via manipulated LZWDecode streams↗2025-10-22
▶

📋Vendor Advisories

2
Red Hat
pypdf: pypdf manipulated LZWDecode streams can exhaust RAM↗2025-10-22
▶
Debian
CVE-2025-62708: pypdf - pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3,...↗2025
▶