Vulnerability record · CVE-2026-25556 · published 6 February 2026

CVE-2026-25556: Artifex mupdf double free vulnerability

Artifex · Mupdf

MuPDF versions 1.23.0 through 1.27.0 contain a double-free vulnerability in fz_fill_pixmap_from_display_list() when an exception occurs during display list rendering. The function accepts a caller-owned fz_pixmap pointer but incorrectly drops the pixmap in its error handling path before rethrowing the exception. Callers (including the barcode decoding path in fz_decode_barcode_from_display_list) also drop the same pixmap in cleanup, resulting in a double-free that can corrupt the heap and crash the process. This issue affects applications that enable and use MuPDF barcode decoding and can be triggered by processing crafted input that causes a rendering-time error while decoding barcodes.

5.9 CVSS 4.0 Medium EPSS 0.77% · top 45.6% CWE-415 · Double free

5.9CVSS 4.0 base score

0.77%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References, 1 tagged exploit

14 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Mupdf Artifex

References

Link	Tags
https://bugs.ghostscript.com/show_bug.cgi?id=709029	ExploitIssue Tracking
https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=d4743b6092d513321c23c6f7fe5cff87cde043c1	Patch
https://mupdf.com/	Product
https://www.vulncheck.com/advisories/mupdf-barcode-decoding-double-free	Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-25556), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.