CVE-2026-40505

EUVD-2026-23147
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.3 LOW
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 6.06%
Affected Products (NVD)
VendorProductVersion
artifexmupdf
𝑥
< 1.27.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
mupdf
bookworm
no-dsa
bookworm (security)
vulnerable
bullseye
no-dsa
bullseye (security)
vulnerable
forky
1.27.0+ds1-6
fixed
sid
1.27.0+ds1-6
fixed
trixie
no-dsa
trixie (security)
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mupdf
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=0f17d789fe8c29b41e47663be82514aaca3a4dfb
https://github.com/ArtifexSoftware/mupdf/commit/0f17d789fe8c29b41e47663be82514aaca3a4dfb
https://github.com/ArtifexSoftware/mupdf/releases/tag/1.27.0
https://www.vulncheck.com/advisories/mupdf-mutool-ansi-injection-via-metadata