CVE-2026-41168

UNKNOWN 0.0

pypdf has possible long runtimes for wrong size values in cross-reference and object streams

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

CWE	CWE-834
Vendor	py-pdf
Product	pypdf
Published	Apr 22, 2026

Stay Ahead of the Next One

Get instant alerts for py-pdf pypdf

Be the first to know when new unknown vulnerabilities affecting py-pdf pypdf are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

py-pdf / pypdf

< 6.10.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx github.com: https://github.com/py-pdf/pypdf/pull/3733 github.com: https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.10.1