CVE-2026-111130: OpenSlide heap out-of-bounds read in MIRAX reader

CVE-2026-111130 · Severity: medium · CVSS 6.1 · Published 2026-10-15

OpenSlide is a C library used to read digital pathology slide images from medical imaging systems. A flaw in its MIRAX reader allows an attacker to craft a malicious slide file that crashes applications opening it, potentially disrupting diagnostic workflows or corrupting tile geometry. The vulnerability cannot be exploited remotely but requires a user to open a crafted slide file.

Technologies: OpenSlide. Vendors: OpenSlide.

Quick answers

Is CVE-2026-111130 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-111130 being exploited in the wild.
How severe is CVE-2026-111130?
Medium severity, with a CVSS score of 6.1, published 15 October 2026.
Which products and versions are affected?
OpenSlide through 4.0.1.
Is there a fix for CVE-2026-111130?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-111130 attacked?
It is attacked with local access.
Am I affected by CVE-2026-111130?
Check whether you run OpenSlide at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a heap out-of-bounds read in the MIRAX reader component, triggered when a crafted Slidedat.ini file contains a CameraImageDivisionsPerSide value that does not evenly divide the image counts, causing the reader to access memory beyond the slide_positions array. An attacker must supply a malicious MIRAX slide file; the application crashes upon opening it and tile geometry becomes corrupted. The fix is available in versions after 4.0.1.

Affected products

  • OpenSlide OpenSlide through 4.0.1

Timeline

  • 2026-10-15: disclosed

References

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