#VU125808 Resource exhaustion in PyPDF - CVE-2026-27888

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Main Vulnerability Database Vulnerabilities #VU125808

#VU125808 Resource exhaustion in PyPDF - CVE-2026-27888

Published: April 10, 2026


Vulnerability identifier: #VU125808
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: CVE-2026-27888
CWE-ID: CWE-400
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 uncontrolled resource consumption in the xfa property processing when accessing a compressed XFA stream using /FlateDecode. A remote attacker can supply a crafted PDF to cause a denial of service.

Exploitation requires the application to access the xfa property of a reader or writer.


Remediation

Install security update from vendor's website.

External links