CVE-2026-26200
HDF5 Affected by H5T__conv_struct_opt Heap Buffer Overflow
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-122 |
| Vendor | hdfgroup |
| Product | hdf5 |
| Published | Feb 19, 2026 |
| Last Updated | Feb 19, 2026 |
Stay Ahead of the Next One
Get instant alerts for hdfgroup hdf5
Be the first to know when new high vulnerabilities affecting hdfgroup hdf5 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
HDFGroup / hdf5
< 1.14.4-2