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

Quick assessment

Affected
Artifex MuPDF
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Artifex Software MuPDF是美国Artifex Software公司的一款免费的、轻量级的PDF阅读器。 Artifex Software MuPDF 1.28.0及之前版本存在缓冲区错误漏洞，该漏洞源于CFF Index Handler组件中subset-cff.c文件的fz_subset_cff_for_gids函数存在越界读取，可能导致本地攻击。

CVSS 3.3 · Low EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 29

VendorProduct Version RangeStatus
Artifex MuPDF 1.0 affected
1.1 affected
1.2 affected
1.3 affected
1.4 affected
1.5 affected
1.6 affected
1.7 affected
… +21 more rows
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I. Basic Information for CVE-2026-7233

Vulnerability Information
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Vulnerability Title
Artifex MuPDF CFF Index subset-cff.c fz_subset_cff_for_gids out-of-bounds
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Artifex Software MuPDF 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Artifex Software MuPDF是美国Artifex Software公司的一款免费的、轻量级的PDF阅读器。 Artifex Software MuPDF 1.28.0及之前版本存在缓冲区错误漏洞，该漏洞源于CFF Index Handler组件中subset-cff.c文件的fz_subset_cff_for_gids函数存在越界读取，可能导致本地攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Artifex MuPDF 1.0 cpe:2.3:a:artifex:mupdf:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7233

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III. Intelligence Information for CVE-2026-7233

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Vendor Advisories for CVE-2026-7233 (2)

Proof of Concept for CVE-2026-7233 (1)

IV. Related Vulnerabilities

Same product: MuPDF
Same vendor: Artifex
Same weakness: CWE-125

V. Comments for CVE-2026-7233

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