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Vulnerability record · CVE-2020-19609 · published 21 July 2021

CVE-2020-19609: Artifex mupdf out-of-bounds write vulnerability

Artifex · Mupdf

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

5.5 CVSS 3.1 Medium EPSS 1.0% · top 36.7% CWE-787 · Out-of-bounds write
5.5CVSS 3.1 base score, v2 4.3
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.ghostscript.com/?p=mupdf.git%3Bh=b7892cdc7fae62aa57d63ae62144e1f11b5f9275
https://bugs.ghostscript.com/show_bug.cgi?id=701176 Issue TrackingPatchVendor Advisory
https://bugs.ghostscript.com/show_bug.cgi?id=703076 ExploitIssue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00013.html Third Party Advisory
http://git.ghostscript.com/?p=mupdf.git%3Bh=b7892cdc7fae62aa57d63ae62144e1f11b5f9275
https://bugs.ghostscript.com/show_bug.cgi?id=701176 Issue TrackingPatchVendor Advisory
https://bugs.ghostscript.com/show_bug.cgi?id=703076 ExploitIssue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00013.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-19609), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.