CVE-2026-40505

Low

Description

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.

SeverityLow

CVSS3.3

Exploit probability—

ProductArtifex Mupdf

PublishedApr 16, 2026

First seenApr 16, 2026

Weakness typeCWE-150CWE-150

How to fix

Update

artifex mupdf1.27.0 or later

Patches

github.com/ArtifexSoftware/mupdf/commit/0f17d789fe8c29b41e47663be82514aaca3a4dfb

Vendor advisories

github.com/ArtifexSoftware/mupdf/releases/tag/1.27.0

Affected products

Product	Affected versions	Fixed in
artifex mupdf	v < 1.27.0	1.27.0

Check your version

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