What’s Vulnerable › Vulnerabilities

CVE-2026-25556: MuPDF 1.23.0 through 1.27.0 Barcode Decoding Double Free

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-06 · updated 2026-07-14
• Weakness: CWE-415

Description

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.

Affected products

• Artifex MuPDF: from 1.23.0 through 1.27.0

References

• https://bugs.ghostscript.com/show_bug.cgi?id=709029
• https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=d4743b6092d513321c23c6f7fe5cff87cde043c1
• https://mupdf.com/
• https://www.vulncheck.com/advisories/mupdf-barcode-decoding-double-free

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