CVE-2018-18651: Xpdfreader Xpdf

Medium severity, CVSS 5.5. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue was discovered in Xpdf 4.00. catalog->getNumPages() in AcroForm.cc allows attackers to launch a denial of service (hang caused by large loop) via a specific pdf file, as demonstrated by pdftohtml. This is mainly caused by a large number after the /Count field in the file.

Affected products

• Xpdfreader Xpdf: version 4.00 only

Published 2018-10-25. Last modified 2026-06-17.