CVE-2026-7233 Details
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.
A heap out-of-bounds read vulnerability has been identified in Artifex MuPDF versions prior to 1.28.0. The issue arises in the CFF Index Handler, specifically within the function 'fz_subset_cff_for_gids' in the file 'subset-cff.c'. The vulnerability is caused by an off-by-one error in the validation of CFF INDEX offsets, allowing a crafted CFF to bypass checks and lead to out-of-bounds memory access. This vulnerability can be exploited locally and has been publicly disclosed, with an available proof-of-concept exploit.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugs.ghostscript.com/show_bug.cgi?id=709328 | CISA-ADP | ExploitMitigationThird Party Advisory |
| https://vuldb.com/submit/802590 | CISA-ADP | ExploitMitigationThird Party AdvisoryVDB Entry |
| https://artifex.com/ | [email protected] | Product |
| https://bugs.ghostscript.com/show_bug.cgi?id=709328 | [email protected] | ExploitMitigationThird Party Advisory |
| https://github.com/biniamf/pocs/tree/main/mupdf-cff-indexload-oobread | [email protected] | Exploit |
| https://vuldb.com/submit/802590 | [email protected] | ExploitMitigationThird Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/359840 | [email protected] | ExploitMitigationThird Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/359840/cti | [email protected] | Permissions RequiredVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| artifex mupdf | <= 1.27.2 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 5, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Initial Analysis | [email protected] |
| Apr 28, 2026 | New CVE Received | [email protected] |