CVE-2018-16648: Artifex Mupdf

Medium severity, CVSS 5.5. EPSS: 1.5% chance of exploitation in the next 30 days.

In Artifex MuPDF 1.13.0, the fz_append_byte function in fitz/buffer.c allows remote attackers to cause a denial of service (segmentation fault) via a crafted pdf file. This is caused by a pdf/pdf-device.c pdf_dev_alpha array-index underflow.

Affected products

• Artifex Mupdf: version 1.13.0 only

Published 2018-09-06. Last modified 2026-06-17.