CVE-2026-48977

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-17 21:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-23 18:12 UTC Last updatedMost recent change to the record

Details

Published

2026-09-17 21:17 UTC

Last modified

2026-09-23 18:12 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-123

Record status

Awaiting Analysis

Attack profile CVSS 4.0 · 7.7

Attack vector

Network

Complexity

High

Attack requirements

None

Privileges needed

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High