MEDIUM 6.0 NVD
CVE-2026-113789
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF that causes large memory usage or long runtimes when an ap
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF that causes large memory usage or long runtimes when an application retrieves the document's form fields. This issue is fixed in version 6.21.0.
References
- https://github.com/py-pdf/pypdf/commit/5ef728f0e16d225c853e89f861ba0a67402fe3f2
- https://github.com/py-pdf/pypdf/pull/4219
- https://github.com/py-pdf/pypdf/releases/tag/6.21.0
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-6vvc-x485-93v7
This medium severity vulnerability with a CVSS score of 6.0 was published on 2026-10-21 via NVD.
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