MEDIUM 6.0 NVD
CVE-2026-113790
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing arrays or dictionaries with many elements, caus
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing arrays or dictionaries with many elements, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.
References
- https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12
- https://github.com/py-pdf/pypdf/pull/4218
- https://github.com/py-pdf/pypdf/releases/tag/6.21.0
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-f54x-cmq8-qg57
This medium severity vulnerability with a CVSS score of 6.0 was published on 2026-10-21 via NVD.
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