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CVE-2026-33123

Published: Mar 20, 2026

Modified: Mar 20, 2026

PUBLISHED

Description

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.1 allow an attacker to craft a malicious PDF which leads to long runtimes and/or large memory usage. Exploitation requires accessing an array-based stream with many entries. This issue has been fixed in version 6.9.1.

Vendor	Product	Versions
py-pdf	pypdf	affected `< 6.9.1`

Weaknesses (CWE)

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-qpxp-75px-xjcp

x_refsource_CONFIRM

https://github.com/py-pdf/pypdf/pull/3686

x_refsource_MISC

https://github.com/py-pdf/pypdf/releases/tag/6.9.1

x_refsource_MISC

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