CVE-2026-40505

LOW 3.3

MuPDF mutool ANSI Injection via Metadata

CVSS Score

3.3

EPSS Score

0.0%

EPSS Percentile

2th

MuPDF mutool does not sanitize PDF metadata fields before writing them to terminal output, allowing attackers to inject arbitrary ANSI escape sequences through crafted PDF metadata. Attackers can embed malicious ANSI escape codes in PDF metadata that are passed unsanitized to the terminal when running mutool info, enabling them to clear the terminal display and render arbitrary text for social engineering attacks such as presenting fake prompts or spoofed commands.

CWE	CWE-150
Vendor	artifex software inc.
Product	mupdf
Published	Apr 16, 2026
Last Updated	Apr 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

Artifex Software Inc. / MuPDF

0 < 0f17d789fe8c29b41e47663be82514aaca3a4dfb

References

NVD ↗ CVE.org ↗ EPSS Data ↗

cgit.ghostscript.com: https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=0f17d789fe8c29b41e47663be82514aaca3a4dfb vulncheck.com: https://www.vulncheck.com/advisories/mupdf-mutool-ansi-injection-via-metadata

Credits

Niel Duysters