Improper Neutralization Affecting mupdf package, versions *


Severity

Recommended
0.0
low
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.17% (6th percentile)

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  • Snyk IDSNYK-ECHOLATEST-MUPDF-21279889
  • published20 Oct 2026
  • disclosed16 Apr 2026

Introduced: 16 Apr 2026

CVE-2026-40505  (opens in a new tab)
CWE-150  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest mupdf.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mupdf package and not the mupdf package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1