Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111130OpenSlide through 4.0.1 Heap Out-of-Bounds Read via MIRAX get_tile_position
Medium 6.1
In plain English
A medium-severity out-of-bounds read in openslide from OpenSlide. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.2%top 90.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | openslide | no fix listed | DEBIAN-CVE-2026-111130 |
| Debian:13 | openslide | no fix listed | DEBIAN-CVE-2026-111130 |
| Debian:14 | openslide | no fix listed | DEBIAN-CVE-2026-111130 |
| Ubuntu:22.04:LTS | openslide | no fix listed | UBUNTU-CVE-2026-111130 |
| Ubuntu:24.04:LTS | openslide | no fix listed | UBUNTU-CVE-2026-111130 |
| Ubuntu:26.04:LTS | openslide | no fix listed | UBUNTU-CVE-2026-111130 |
| Ubuntu:26.10 | openslide | no fix listed | UBUNTU-CVE-2026-111130 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- https://hackmd.io/@haind-pwn/openslide-mirax-slide-position-index-oob-read technical-description
- https://github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/src/openslide-vendor-mirax.c#L611-L635 technical-description
- https://github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/src/openslide-vendor-mirax.c#L1033-L1034 technical-description
- https://github.com/openslide/openslide product
- VulnCheck Advisory: OpenSlide through 4.0.1 Heap Out-of-Bounds Read via MIRAX get_tile_position third-party-advisory
- https://hackmd.io/@haind-pwn/cve-2026-111130-openslide-mirax-slide-position-index-oob-read exploit