CVE-2026-111130: openslide · Out-of-bounds Read
Affects openslideSource CVE Database V5
Public exploit available · CVSS 6.9 Medium.
Data as of 26 Oct 2026, 21:47 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- Proof of concept is public or traded
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-10-21.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:NExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 15 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CISA SSVC: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by VulnCheck
, 2 hours before disclosure
CVE published
on cve.org
, t = 0
CISA SSVC assessment
proof of concept public
, 6 days after disclosure
In Threat Radar
record ingested
, 11 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| OpenSlideopenslide | Affected
| Fixed in– |
GitHubopenslidepkg:github/openslideOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, avoid opening untrusted MIRAX slides with OpenSlide versions up to 4.0.1.
Description
OpenSlide versions up to 4.0.1 contain a heap out-of-bounds read vulnerability in the MIRAX slide reader. This flaw occurs when crafted Slidedat.ini values cause the CameraImageDivisionsPerSide parameter to not evenly divide the image counts, allowing reading beyond the slide_positions array. This can crash applications opening such slides and corrupt tile geometry.
References
- hackmd.io/@haind-pwn/openslide-mirax-slide-position-index-oob-read (opens in a new tab)
- github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/src/openslide-vendor-mirax.c (opens in a new tab)
- github.com/openslide/openslide/blob/fe79a9713bef2bfd64bbfefd15704060764b1274/src/openslide-vendor-mirax.c (opens in a new tab)
- github.com/openslide/openslide (opens in a new tab)
- vulncheck.com/advisories/openslide-through-4.0.1-heap-out-of-bounds-read-via-mirax-get-tile-position (opens in a new tab)
- hackmd.io/@haind-pwn/cve-2026-111130-openslide-mirax-slide-position-index-oob-read (opens in a new tab)