CVE-2025-62708: pypdf — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-409 CWE-409

Affected Products

Vendor	Product	Versions
pypdf_project	pypdf	< 6.1.3

References

Advisories & Patches

https://github.com/py-pdf/pypdf/commit/e51d07807ffcdaf18077b9486dadb3dc05b368da https://github.com/py-pdf/pypdf/pull/3502 https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j

Other References

https://github.com/py-pdf/pypdf/releases/tag/6.1.3

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-62708? +

CVE-2025-62708 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-62708? +

CVE-2025-62708 affects products from pypdf_project, specifically: pypdf. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-62708? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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