CVE-2026-113790

Summary

pypdf: Possible large memory usage when parsing arrays and dictionaries

Severity

medium

EPSS

0.4% (p33)

CWE

CWE-400

Also known as

GHSA-f54x-cmq8-qg57

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. This requires parsing arrays and/or dictionaries with lots of elements.

Patches

This has been fixed in pypdf==6.21.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4218.

References

• https://github.com/advisories/GHSA-f54x-cmq8-qg57
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-f54x-cmq8-qg57
• https://nvd.nist.gov/vuln/detail/CVE-2026-113790
• https://github.com/py-pdf/pypdf/pull/4218
• https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12
• https://github.com/py-pdf/pypdf/releases/tag/6.21.0

Related advisories

• CVE-2026-115572 — high · PyPI/pypdf
• CVE-2026-115585 — high · PyPI/pypdf
• CVE-2026-102999 — high · PyPI/pypdf
• CVE-2026-102998 — high · PyPI/pypdf
• CVE-2026-103000 — high · PyPI/pypdf
• CVE-2026-102997 — high · PyPI/pypdf
• CVE-2026-102996 — high · PyPI/pypdf
• CVE-2026-102995 — high · PyPI/pypdf

Is your project exposed to this? Stateward checks every dependency on every pull request and flags it only if your code actually reaches it.

Summarize with AI

ChatGPTClaudePerplexity