What is CVE-2026-40505?

CVE-2026-40505 is a low-severity vulnerability in Artifex Mupdf, classified under CWE-150. CVSS score: 3.3/10. Published 2026-04-16.

How severe is CVE-2026-40505?

Low severity. CVSS v3 base score is 3.3 out of 10.

Vulnerability in Artifex Mupdf

CVE-2026-40505

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…

EPSS: 0.000 (0.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Artifex Mupdf
Artifex Software Inc. Mupdf — versions 0, 0f17d789fe8c29b41e47663be82514aaca3a4dfb

Weakness classification (CWE)

CWE-150

References

disclosure@vulncheck.com (release-notes, Product)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (issue-tracking, Patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-40505?: CVE-2026-40505 is a low-severity vulnerability in Artifex Mupdf, classified under CWE-150. CVSS score: 3.3/10. Published 2026-04-16.
How severe is CVE-2026-40505?: Low severity. CVSS v3 base score is 3.3 out of 10.