CVE-2026-59938

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.

Weakness Type (CWE)

CWE-789 CWE-789

References

Other References

https://github.com/py-pdf/pypdf/commit/c64583be16b8e8763d8777075f8ecbf382014b7a https://github.com/py-pdf/pypdf/pull/3888 https://github.com/py-pdf/pypdf/releases/tag/6.14.0 https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp

Frequently Asked Questions

What is CVE-2026-59938? +

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.

How do I check if I'm vulnerable to CVE-2026-59938? +

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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