CVE-2026-33699

UNKNOWN 0.0

pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

12th

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.

CWE	CWE-835
Vendor	py-pdf
Product	pypdf
Published	Mar 26, 2026
Last Updated	Mar 27, 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

< 6.9.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3 github.com: https://github.com/py-pdf/pypdf/pull/3693 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.9.2