High 7.7Published Sep 17, 2026

CVE-2026-48977OpenSlide: Arbitrary memory write with crafted Ventana BIF file

Updated under an hour ago (2026-10-19 08:50 UTC)

Does this affect you?

It affects openslide. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for openslide

Exploited in the last 30 days

OpenSlide is a C library for reading whole slide image files. From 3.4.1 until 4.0.1, OpenSlide's parse_level0_xml() processing in src/openslide-vendor-ventana.c accepts nonpositive row or column tile counts from a crafted Ventana BIF file. The invalid counts produce attacker-controlled relative memory offsets and allow arbitrary values to be written at those offsets, affecting all supported platforms and configurations and resulting in a crash or potential arbitrary code execution. This issue is fixed in version 4.0.1.

CVSS: 7.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-123, CWE-823, CWE-1284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

openslide openslide openslide:openslide (from the name)	from 3.4.1, < 4.0.1	CNA record

References

https://github.com/openslide/openslide/security/advisories/GHSA-mxg2-48g7-fmwcx-refsource-confirm
https://github.com/openslide/openslide/pull/751x-refsource-misc
https://github.com/openslide/openslide/commit/2be88bd782d9fff46de8e56a99baca523e7917b3x-refsource-misc
https://github.com/openslide/openslide/releases/tag/v4.0.1x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.