Out-of-bounds Read in Openslide
CVE-2026-111130
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/openslide-mirax-slide-position-index-oob-read (technical-description)
- github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/sr… (technical-description)
- github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/sr… (technical-description)
- github.com/openslide/openslide (product)
- www.vulncheck.com/advisories/openslide-through-4.0.1-heap-out-of-bounds-read-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111130?
- CVE-2026-111130 is a medium-severity vulnerability in Openslide, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-10-15.
- How severe is CVE-2026-111130?
- Medium severity. CVSS v3 base score is 6.1 out of 10.