CVE•Published 2026-07-20•Modified 2026-07-29•0 articles on news•6 live references•NVD data

CVE-2026-26199Hdfgroup · Hdf5

Vulnerability data via NVD (ingested)

CVSS v3.1

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS percentile

Exploit Prediction Scoring System · top 80% of all CVEs

Weaknesses (CWE)

CWE-124Buffer Underwrite ('Buffer Underflow')

Description

HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked on a group id with `0` for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if `H5Iget_name` is invoked in a way where `size` can be forced to zero, and there is important data before the `name` buffer.

Timeline

Published 2026-07-20

Modified 2026-07-29

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-26199

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Hdfgroup Hdf5"

All exposed Hdfgroup Hdf5 instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Hdf5"

HTTP body or banner mentions "Hdf5" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-26199