CVE-2026-115572

UNKNOWN 0.0

pypdf: Possible long runtimes for repeated references to the same missing object

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF that repeatedly references the same nonexistent indirect object, causing relevant file parts such as pages to trigger repeated full-file recovery loads and long runtimes when accessed. This issue is fixed in version 6.21.2.

CWE	CWE-400
Vendor	py-pdf
Product	pypdf
Published	Oct 23, 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

< 6.21.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-6c7f-9265-g8fw github.com: https://github.com/py-pdf/pypdf/pull/4240 github.com: https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b github.com: https://github.com/py-pdf/pypdf/releases/tag/6.21.2