Every CVE Search/ Get API key

CVE-2026-40505

MuPDF < 1.27 mutool ANSI Injection via Metadata

4.8 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

0.17%Up 0.2 points since Apr 16, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.8

MuPDF < 1.27 mutool ANSI Injection via Metadata

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.

Record
CVE-2026-40505
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness
CWE-150
Updated
2026-11-02
EUVDEUVD-2026-23147 4.8

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.

Record
EUVD-2026-23147
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-hj44-m5xv-x75q 4.8

MuPDF mutool does not sanitize PDF metadata fields before writing them to terminal output,...

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.

Record
GHSA-hj44-m5xv-x75q
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness
CWE-150
Updated
2026-11-02
NVD 4.8

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.

Record
CVE-2026-40505
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness
CWE-150
Updated
2026-11-02
OSV 4.8

MuPDF < 1.27 mutool ANSI Injection via Metadata

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.

Record
CVE-2026-40505
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-150
Updated
2026-11-02
OSVDEBIAN-CVE-2026-40505 4.8

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.

Record
DEBIAN-CVE-2026-40505
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-40505 4.8

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.

Record
UBUNTU-CVE-2026-40505
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
mupdf
Debian:12
 All versions, plus listed versions
1.21.1+ds2-11.21.1+ds2-1+deb12u11.22.1+ds1-11.22.2+ds1-11.22.2+ds1-2
Show 27 moreShow less
1.23.10+ds1-11.23.10+ds1-21.23.6+ds1-11.23.7+ds1-11.24.10+ds1-11.24.3+ds1-11.24.8+ds2-11.24.8+ds2-21.24.9+ds1-11.25.1+ds1-11.25.1+ds1-21.25.1+ds1-31.25.1+ds1-41.25.1+ds1-51.25.1+ds1-61.25.1+ds1-71.25.1+ds1-81.25.1+ds1-91.27.0+ds1-11.27.0+ds1-21.27.0+ds1-31.27.0+ds1-41.27.0+ds1-51.27.0+ds1-61.28.0+ds1-11.28.2+ds1-11.28.2+ds1-2
 None known
mupdf
Debian:13
 All versions, plus listed versions
1.25.1+ds1-61.25.1+ds1-6+deb13u11.25.1+ds1-71.25.1+ds1-81.25.1+ds1-9
Show 9 moreShow less
1.27.0+ds1-11.27.0+ds1-21.27.0+ds1-31.27.0+ds1-41.27.0+ds1-51.27.0+ds1-61.28.0+ds1-11.28.2+ds1-11.28.2+ds1-2
 None known
mupdf
Debian:14
 before 1.27.0+ds1-5, plus listed versions
1.25.1+ds1-61.25.1+ds1-71.25.1+ds1-81.25.1+ds1-91.27.0+ds1-11.27.0+ds1-21.27.0+ds1-31.27.0+ds1-4
1.27.0+ds1-5
mupdf
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.7-11.7a-11.7a-1ubuntu0.1~esm1
 None known
mupdf
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.11+ds1-1.11.11+ds1-21.12.0+ds1-11.12.0+ds1-1ubuntu0.1~esm11.12.0+ds1-1ubuntu0.1~esm2
 None known
mupdf
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
1.15.0+ds1-11.16.1+ds1-1ubuntu11.16.1+ds1-1ubuntu1+esm11.16.1+ds1-1ubuntu1+esm2
 None known
mupdf
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
1.17.0+ds1-21.19.0+ds1-11.19.0+ds1-1build11.19.0+ds1-21.19.0+ds1-2ubuntu0.1~esm1
 None known
mupdf
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
1.22.2+ds1-21.22.2+ds1-2build11.23.6+ds1-11.23.7+ds1-11.23.10+ds1-1
Show 4 moreShow less
1.23.10+ds1-1build11.23.10+ds1-1build21.23.10+ds1-1build31.23.10+ds1-1ubuntu0.1~esm1
 None known
mupdf
Ubuntu:25.10
 All versions, plus listed versions
1.25.1+ds1-5build21.25.1+ds1-61.25.1+ds1-7
 None known
mupdf
Ubuntu:26.10
 All versions, plus listed versions
1.27.0+ds1-3ubuntu21.27.0+ds1-3ubuntu3
 None known
mupdf
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.25.1+ds1-71.25.1+ds1-7build11.25.1+ds1-7build21.27.0+ds1-2ubuntu11.27.0+ds1-3ubuntu11.27.0+ds1-3ubuntu2
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-40505 is a medium vulnerability (CVSS 4.8) in Artifex Mupdf, published April 16, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 5th percentile. Fixed in mupdf 1.27.0+ds1-5.

References

Show 5 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open