HDF5 Affected by H5T__conv_struct_opt Heap Buffer Overflow_CVE-2026-26200

7.8 / 10

HIGH

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

Description

HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an `h5` file parsed by HDF5 can trigger a write-based heap buffer overflow condition. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems. Real-world exploitability of this issue in terms of remote-code execution is currently unknown. Version 1.14.4-2 fixes the issue.

Basic Information

ID CVE-2026-26200

Source GitHub_M

Published Feb 19, 2026 at 19:19

Affected Product

Vendor HDFGroup

Product hdf5

Version < 1.14.4-2

Affected Versions HDFGroup hdf5 < 1.14.4-2

CWE Classification

CWE-122

References

github.com /HDFGroup/hdf5/security/advisories/GHSA-5p2m-j456-9mr2

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