CVE-2026-26197: hdf5 before 2.1.0 (exclusive), < 2.0.0

CVE-2026-26197. CVSS 3.1 base score 7.5 (HIGH, NVD). EPSS 0.00367 (percentile 0.2938), scored 24-Oct-2026.

Affected technology

hdf5 · before 2.1.0 (exclusive)
hdfgroup

hdf5 · < 2.0.0
HDFGroup

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · Active user interaction

What an attacker can do

Vendor/CNA’s CVSS 4.0 assessment (base score 5.9/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 25-Oct-2026 01:30 UTC

CWE: CWE-125
CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · NVD
EPSS: 0.00367 · percentile 0.2938 · 2026-10-24
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-25 01:28:19.133527+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-26197.html