CVE-2026-7233: Artifex MuPDF CFF Index subset-cff.c fz_subset_cff_for_gids out-of-bounds

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-28 · updated 2026-10-26
Weakness: CWE-119

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.

Affected products

Artifex MuPDF: through 1.27.2

References

https://artifex.com/
https://bugs.ghostscript.com/show_bug.cgi?id=709328
https://github.com/biniamf/pocs/tree/main/mupdf-cff-indexload-oobread
https://vuldb.com/submit/802590
https://vuldb.com/vuln/359840
https://vuldb.com/vuln/359840/cti
https://bugs.ghostscript.com/show_bug.cgi?id=709328
https://vuldb.com/submit/802590

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