CVE-2026-29043: Hdfgroup HDF5

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. 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.

Affected products

• Hdfgroup HDF5: up to and including 1.14.1-2

Published 2026-04-10. Last modified 2026-06-17.