What is CVE-2025-62708?

CVE-2025-62708 is a high-severity vulnerability in Py-Pdf Pypdf, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2025-10-22.

How severe is CVE-2025-62708?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Py-Pdf Pypdf

CVE-2025-62708

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.

Published 2025-10-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (38.0th percentile), scored 2026-09-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Py-Pdf Pypdf — versions < 6.1.3
Pypdf Project

Weakness classification (CWE)

CWE-409 — Improper Handling of Highly Compressed Data (Data Amplification)

References

github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j (Patch, Vendor Advisory)
github.com/py-pdf/pypdf/pull/3502 (Patch)
github.com/py-pdf/pypdf/commit/e51d07807ffcdaf18077b9486dadb3dc05b368da (Patch)
github.com/py-pdf/pypdf/releases/tag/6.1.3 (Release Notes)

Frequently asked questions

What is CVE-2025-62708?: CVE-2025-62708 is a high-severity vulnerability in Py-Pdf Pypdf, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2025-10-22.
How severe is CVE-2025-62708?: High severity. CVSS v3 base score is 7.5 out of 10.