CVE-2026-22690
Severity CVSS v4.0:
LOW
Type:
CWE-400
Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
10/01/2026
Last modified:
10/01/2026
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.