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.

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

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

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/27/2026 Advisory disclosed
04/27/2026 +0 days VulDB entry created
04/27/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: artifex.com

Advisory: 709328
Status: Not defined

CVE: CVE-2026-7233 (🔒)
GCVE (CVE): GCVE-0-2026-7233
GCVE (VulDB): GCVE-100-359840
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/27/2026 19:05
Changes: 04/27/2026 19:05 (59)
Complete: 🔍
Submitter: biniam
Cache ID: 216::103

Submitinfo

Accepted

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

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