CVE-2026-40505: Artifex Mupdf

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

MuPDF before 1.27 contains an ANSI injection vulnerability in mutool that allows attackers to inject arbitrary ANSI escape sequences through crafted PDF metadata fields. Attackers can embed malicious ANSI escape codes in PDF metadata that are passed unsanitized to terminal output when running mutool info, enabling them to manipulate terminal display for social engineering attacks such as presenting fake prompts or spoofed commands.

Affected products

• Artifex Mupdf: before 1.27.0 (fixed in 1.27.0)

Published 2026-04-16. Last modified 2026-06-17.