Unrated severityNVD Advisory· Published Feb 19, 2026· Updated Feb 19, 2026
HDF5 Affected by H5T__conv_struct_opt Heap Buffer Overflow
CVE-2026-26200
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.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- github.com/HDFGroup/hdf5/security/advisories/GHSA-5p2m-j456-9mr2mitrex_refsource_CONFIRM
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