---
id: CVE-2026-112036
title: Artifex MuPDF Signature Locking pdf-xref.c free_char_list double free
summary: >-
  A vulnerability was detected in Artifex MuPDF up to 1.28.5. This impacts the
  function free_char_list of the file source/pdf/pdf-xref.c of the component
  Signature Locking. Performing a manipulation results in double free. The
  attack may b…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-415
  - CWE-119
vendor: Artifex
product: MuPDF
affected:
  - MuPDF 1.28.0
  - MuPDF 1.28.1
  - MuPDF 1.28.2
  - MuPDF 1.28.3
  - MuPDF 1.28.4
  - MuPDF 1.28.5
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T00:45:12.234Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112036'
references:
  - url: 'https://vuldb.com/vuln/421684'
    label: >-
      VDB-421684 | Artifex MuPDF Signature Locking pdf-xref.c free_char_list
      double free
  - url: 'https://vuldb.com/vuln/421684/cti'
    label: 'VDB-421684 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-112036'
    label: CVE-2026-112036 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1008495'
    label: 'Submit #1008495 | MuPDF 1.28.5 Double Free'
  - url: 'https://bugs.ghostscript.com/show_bug.cgi?id=709768'
  - url: 'https://bugs.ghostscript.com/attachment.cgi?id=28609'
  - url: >-
      http://www.ghostscript.com/cgi-bin/findgit.cgi?3984925b660afb8a781ddf504021e91be1bc671e
  - url: 'https://artifex.com/'
tags:
  - cve.org
ingestedAt: '2026-10-19T01:55:59.835Z'
---

## Overview

A vulnerability was detected in Artifex MuPDF up to 1.28.5. This impacts the function free_char_list of the file source/pdf/pdf-xref.c of the component Signature Locking. Performing a manipulation results in double free. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named 3984925b660afb8a781ddf504021e91be1bc671e. To fix this issue, it is recommended to deploy a patch.

## Affected

- `MuPDF 1.28.0`
- `MuPDF 1.28.1`
- `MuPDF 1.28.2`
- `MuPDF 1.28.3`
- `MuPDF 1.28.4`
- `MuPDF 1.28.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.