CVE-2018-18662

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as...

5.5 MediumFix available

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.61%Up 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 5.5

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Record: CVE-2018-18662
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-125
Updated: 2026-11-02

CVE List No score

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Record: CVE-2018-18662
Updated: 2026-11-02

EUVDEUVD-2018-10378 No score

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Record: EUVD-2018-10378
Updated: 2026-11-03

GitHub AdvisoriesGHSA-586q-86c8-92q7 5.5

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as...

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Record: GHSA-586q-86c8-92q7
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-125
Updated: 2026-11-02

OSV 5.5

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Record: CVE-2018-18662
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-18662 5.5

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Record: DEBIAN-CVE-2018-18662
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-18662 5.5

There is an out-of-bounds read in fz_run_t3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.

Record: UBUNTU-CVE-2018-18662
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2024:11068-1 No score

mupdf-1.18.0-1.7 on GA media

These are all security issues fixed in the mupdf-1.18.0-1.7 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:11068-1
Updated: 2026-11-02

Affected products

artifex mupdf

Affected packages

Affected packages
Package	Affected	Fixed
`mupdf` Debian:12	before 1.14.0+ds1-3	1.14.0+ds1-3
`mupdf` Debian:13	before 1.14.0+ds1-3	1.14.0+ds1-3
`mupdf` Debian:14	before 1.14.0+ds1-3	1.14.0+ds1-3
`mupdf` Debian:9 From an advisory covering 5 CVEs	before 1.9a+ds1-4+deb9u5, plus listed versions 1.9a+ds1-41.9a+ds1-4+deb9u11.9a+ds1-4+deb9u21.9a+ds1-4+deb9u31.9a+ds1-4+deb9u4	1.9a+ds1-4+deb9u5
`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` openSUSE:Tumbleweed From an advisory covering 18 CVEs	before 1.18.0-1.7	1.18.0-1.7

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2018-18662 is a medium vulnerability (CVSS 5.5) in Artifex Mupdf, published October 26, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.61%, the 75th percentile. Fixed in mupdf 1.14.0+ds1-3.

References

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