CVE-2026-3308: Artifex Software Inc. pymupdf Mupdf

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

An integer overflow vulnerability in 'pdf-image.c' in Artifex's MuPDF version 1.27.0 allows an attacker to maliciously craft a PDF that can trigger an integer overflow within the 'pdf_load_image_imp' function. This allows a heap out-of-bounds write that could be exploited for arbitrary code execution.