CVE-2020-26519

fitz/pixmap.c in Artifex MuPDF 1.17.0 has an overflow during pixmap size calculation.

5.5 MediumFix available

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

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

1.03%Down 0.8 points since Apr 14, 2021

What each source reports

NVD Score used 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

Record: CVE-2020-26519
CVSS 3.1: 5.5 MediumCVSS:3.1/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-787
Updated: 2026-11-02

CVE List No score

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

Record: CVE-2020-26519
Updated: 2026-11-02

EUVDEUVD-2020-19066 No score

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

Record: EUVD-2020-19066
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pgrw-q27m-5995 No score

fitz/pixmap.c in Artifex MuPDF 1.17.0 has an overflow during pixmap size calculation.

fitz/pixmap.c in Artifex MuPDF 1.17.0 has an overflow during pixmap size calculation.

Record: GHSA-pgrw-q27m-5995
Weakness: CWE-787
Updated: 2026-11-02

OSVALPINE-CVE-2020-26519 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

Record: ALPINE-CVE-2020-26519
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSV 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

Record: CVE-2020-26519
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-26519 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

Record: DEBIAN-CVE-2020-26519
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-26519 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

Record: UBUNTU-CVE-2020-26519
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mupdf` Alpine:v3.12	before 1.17.0-r2	1.17.0-r2
`mupdf` Alpine:v3.13	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.14	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.15	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.16	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.17	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.18	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.19	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.20	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.21	before 1.17.0-r3	1.17.0-r3

Show 11 moreShow less

Affected packages
Package	Affected	Fixed
`mupdf` Alpine:v3.22	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.23	before 1.17.0-r3	1.17.0-r3
`mupdf` Alpine:v3.24	before 1.17.0-r3	1.17.0-r3
`mupdf` Debian:12	before 1.17.0+ds1-1.1	1.17.0+ds1-1.1
`mupdf` Debian:13	before 1.17.0+ds1-1.1	1.17.0+ds1-1.1
`mupdf` Debian:14	before 1.17.0+ds1-1.1	1.17.0+ds1-1.1
`mupdf` Debian:9 From an advisory covering 2 CVEs	before 1.9a+ds1-4+deb9u6, plus listed versions 1.9a+ds1-41.9a+ds1-4+deb9u11.9a+ds1-4+deb9u21.9a+ds1-4+deb9u31.9a+ds1-4+deb9u41.9a+ds1-4+deb9u5	1.9a+ds1-4+deb9u6
`mupdf` Debian:10	before 1.14.0+ds1-4+deb10u2, plus listed versions 1.14.0+ds1-41.14.0+ds1-4+deb10u1	1.14.0+ds1-4+deb10u2
`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

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	affected, aliases, references	OSV
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-2020-26519 is a medium vulnerability (CVSS 5.5) in Artifex Mupdf, published October 2, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.03%, the 63rd percentile. Fixed in mupdf 1.17.0-r2.

References

Show 10 moreShow less