CVE-2026-7233 Artifex MuPDF CFF Index subset-cff.c fz_subset_cff_for_gids out-of-bounds
A local attacker can trigger an out-of-bounds read in MuPDF's CFF Index Handler, potentially causing a crash or information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7233?
CVE-2026-7233 is a medium-severity memory corruption vulnerability in Artifex Mupdf, published on 28 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-7233?
It affects 1 product.
Products include Artifex Mupdf.
How do I fix CVE-2026-7233?
No fix has been published for CVE-2026-7233 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-7233 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7233 exists.
Other vulnerabilities in Artifex Mupdf
Sources
Also known as DEBIAN-CVE-2026-7233, GHSA-82r2-3cm6-cxw2, UBUNTU-CVE-2026-7233.