CVE-2026-26199
Medium · 6.5CVSS
6.5
EPSS
0.4%
Published
Jul 20, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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