---
id: CVE-2026-111130
title: >-
  OpenSlide through 4.0.1 contains a heap out-of-bounds read vulnerability in
  the MIRAX reader that allows attackers to read past the slide_positions array
  via crafted Slidedat.ini values
summary: >-
  OpenSlide through 4.0.1 contains a heap out-of-bounds read vulnerability in
  the MIRAX reader that allows attackers to read past the slide_positions array
  via crafted Slidedat.ini values. Attackers can supply a MIRAX slide whose
  CameraIma…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'
cwe:
  - CWE-125
vendor: OpenSlide
product: openslide
affected:
  - openslide <= 4.0.1
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:26.517'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111130'
references:
  - url: 'https://github.com/openslide/openslide'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/src/openslide-vendor-mirax.c#L1033-L1034
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/src/openslide-vendor-mirax.c#L611-L635
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/openslide-mirax-slide-position-index-oob-read'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openslide-through-4.0.1-heap-out-of-bounds-read-via-mirax-get-tile-position
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.408Z'
---

## Overview

OpenSlide through 4.0.1 contains a heap out-of-bounds read vulnerability in the MIRAX reader that allows attackers to read past the slide_positions array via crafted Slidedat.ini values. Attackers can supply a MIRAX slide whose CameraImageDivisionsPerSide does not evenly divide the image counts, crashing applications that open it and corrupting tile geometry.

## Remediation

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