CVE-2018-18020: Qpdf Project Qpdf

Low severity, CVSS 3.3. EPSS: 1.2% chance of exploitation in the next 30 days.

In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted PDF file.

Affected products

Published 2018-10-06. Last modified 2026-06-17.