Medium severity · published Apr 28, 2026
CVE-2026-7233
Artifex MuPDF CFF Index subset-cff.c fz_subset_cff_for_gids out-of-bounds
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
A vulnerability was determined in Artifex MuPDF up to 1.28.0. The impacted element is the function fz_subset_cff_for_gids of the file subset-cff.c of the component CFF Index Handler. This manipulation causes out-of-bounds read. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through a bug report but has not responded yet.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MU
MuPDF · Artifex
1.0; 1.1; 1.2; 1.3; 1.4; 1.5; +23 more · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7233
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7233
Product
https://artifex.com/
Exploit
https://bugs.ghostscript.com/show_bug.cgi?id=709328
Exploit
https://github.com/biniamf/pocs/tree/main/mupdf-cff-indexload-oobread
Exploit
https://vuldb.com/submit/802590
Exploit
https://vuldb.com/vuln/359840
Permissions Required
https://vuldb.com/vuln/359840/cti
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