Artifex MuPDF up to 1.28.0 CFF Index subset-cff.c fz_subset_cff_for_gids out-of-bounds

Summaryinfo

A vulnerability described as problematic has been identified in Artifex MuPDF up to 1.28.0. This affects the function fz_subset_cff_for_gids of the file subset-cff.c of the component CFF Index Handler. Such manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2026-7233. The attack can only be performed from a local environment. Furthermore, an exploit is available. The project was informed of the problem early through a bug report but has not responded yet.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Artifex MuPDF up to 1.28.0. Affected by this issue is the function fz_subset_cff_for_gids of the file subset-cff.c of the component CFF Index Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality.

The advisory is shared for download at bugs.ghostscript.com. This vulnerability is handled as CVE-2026-7233. The exploitation is known to be easy. The attack needs to be approached locally. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. The project was informed of the problem early through a bug report but has not responded yet. The vulnerability scanner Nessus provides a plugin with the ID 310837 (Linux Distros Unpatched Vulnerability : CVE-2026-7233), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (310837) and EUVD (EUVD-2026-26000). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Document Reader Software

Vendor

• Artifex

Name

• MuPDF

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28.0

License

• commercial

Website

• Vendor: https://artifex.com/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #802590: Artifex MuPDF 1.28 Out-of-Bounds Read (by biniam)

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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