Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.

INFO

Published Date :

2026-01-10T04:41:20.773Z

Last Modified :

2026-01-12T17:07:00.323Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-22690 vulnerability.

Vendors Products
Py-pdf
  • Pypdf
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-22690.

URL Resource
https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/pull/3594 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/releases/tag/6.6.0 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/security/advisories/GHSA-4xc4-762w-m6cg cve-icon cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability