CVE-2026-113789: pypdf: Possible long runtimes/large memory usage when retrieving form fields

October 22, 2026

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage and/or long runtimes. This requires retrieving the form fields of a document.

References

github.com/advisories/GHSA-6vvc-x485-93v7
github.com/py-pdf/pypdf/commit/5ef728f0e16d225c853e89f861ba0a67402fe3f2
github.com/py-pdf/pypdf/pull/4219
github.com/py-pdf/pypdf/releases/tag/6.21.0
github.com/py-pdf/pypdf/security/advisories/GHSA-6vvc-x485-93v7
nvd.nist.gov/vuln/detail/CVE-2026-113789

Code Behaviors & Features

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