#VU126253 Uncontrolled Memory Allocation in PyPDF

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Main Vulnerability Database Vulnerabilities #VU126253

#VU126253 Uncontrolled Memory Allocation in PyPDF

Published: April 15, 2026


Vulnerability identifier: #VU126253
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
PyPDF
Software vendor:
Pypdf Project

Description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to memory allocation with excessive size value in the FlateDecode image handling functionality when processing a crafted PDF containing large image dimension values. A remote attacker can supply a specially crafted PDF to cause a denial of service.


Remediation

Install security update from vendor's website.

External links