Low 3.3Published Apr 15, 2026

CVE-2026-40505MuPDF < 1.27 mutool ANSI Injection via Metadata

Updated under an hour ago (Oct 27, 2026, 1:50 PM ET)

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It affects Artifex Software Inc. MuPDF and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Artifex Software Inc. MuPDF

Exploited in the last 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.

CVSS: 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-150
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Artifex Software Inc. MuPDF artifex_software:mupdf (from the name)	before 1.27.0; 0f17d789fe8c29b41e47663be82514aaca3a4dfb	CNA record
artifex mupdf artifex:mupdf	before 1.27.0	NVD

References

References

https://github.com/ArtifexSoftware/mupdf/releases/tag/1.27.0	release-notes, product
https://github.com/ArtifexSoftware/mupdf/commit/0f17d789fe8c29b41e47663be82514aaca3a4dfb	patch
https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=0f17d789fe8c29b41e47663be82514aaca3a4dfb	issue-tracking, patch
https://www.vulncheck.com/advisories/mupdf-mutool-ansi-injection-via-metadata	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.