CVE-2026-113789

Summary

pypdf: Possible long runtimes/large memory usage when retrieving form fields

Severity

medium

EPSS

0.4% (p33)

CWE

CWE-400, CWE-407

Also known as

GHSA-6vvc-x485-93v7

Published

2026-10-22

Updated

2026-10-22

Advisory details

Impact

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.

Patches

This has been fixed in pypdf==6.21.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4219.

References

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

Related advisories

• CVE-2026-115585 — high · PyPI/pypdf
• CVE-2026-102999 — high · PyPI/pypdf
• CVE-2026-102997 — high · PyPI/pypdf
• CVE-2026-102994 — high · PyPI/pypdf
• CVE-2026-115572 — high · PyPI/pypdf
• CVE-2026-102998 — high · PyPI/pypdf
• CVE-2026-103000 — high · PyPI/pypdf
• CVE-2026-102996 — high · PyPI/pypdf

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