# HDF Group HDF5 vulnerabilities

Source: https://junglewise.ai/threats/technologies/hdf-group-hdf5  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/hdf-group-hdf5.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in HDF Group HDF5: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-120757, was published on 3 November 2026. 2 vulnerabilities in the last four weeks, level on the four before (2).

## Counts

- Last 7 days: 0
- Last 30 days: 2
- Last 90 days: 4
- All time: 4 (0 critical, 0 exploited in the wild)

## About HDF Group HDF5

Data format and library for storing and managing large amounts of numerical and multi-dimensional data.

## Latest HDF Group HDF5 vulnerabilities

- [CVE-2026-120757: HDF5 heap buffer over-read in external link traversal](https://junglewise.ai/threats/cve-2026-120757-hdf5-through-2-2-0-contains-a-heap-buffer-over-read) (info, published 3 Nov 2026)
- [CVE-2026-120754: HDF5 uninitialized memory read in scaleoffset filter](https://junglewise.ai/threats/cve-2026-120754-hdf5-through-2-2-0-contains-an-uninitialized-memory-read) (info, published 3 Nov 2026)
- [CVE-2026-19029: HDF5 heap buffer over-read in scale-offset filter decode](https://junglewise.ai/threats/cve-2026-19029-a-heap-based-buffer-over-read-in-h5z-filter-scaleoffset-in-src) (info, published 6 Oct 2026)
- [CVE-2026-106547: HDF5 heap-based buffer overflow in H5VM_array_fill](https://junglewise.ai/threats/cve-2026-106547-a-heap-based-buffer-overflow-in-h5vm-array-fill-in-src-h5vm-c-in) (info, published 6 Oct 2026)

## Most severe HDF Group HDF5 vulnerabilities

- [CVE-2026-120757: HDF5 heap buffer over-read in external link traversal](https://junglewise.ai/threats/cve-2026-120757-hdf5-through-2-2-0-contains-a-heap-buffer-over-read) (info, published 3 Nov 2026)
- [CVE-2026-120754: HDF5 uninitialized memory read in scaleoffset filter](https://junglewise.ai/threats/cve-2026-120754-hdf5-through-2-2-0-contains-an-uninitialized-memory-read) (info, published 3 Nov 2026)
- [CVE-2026-19029: HDF5 heap buffer over-read in scale-offset filter decode](https://junglewise.ai/threats/cve-2026-19029-a-heap-based-buffer-over-read-in-h5z-filter-scaleoffset-in-src) (info, published 6 Oct 2026)
- [CVE-2026-106547: HDF5 heap-based buffer overflow in H5VM_array_fill](https://junglewise.ai/threats/cve-2026-106547-a-heap-based-buffer-overflow-in-h5vm-array-fill-in-src-h5vm-c-in) (info, published 6 Oct 2026)

## Vulnerabilities per week

2 vulnerabilities in the last four weeks, level on the four before (2).

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 2 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 2 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "HDF Group HDF5 vulnerabilities", https://junglewise.ai/threats/technologies/hdf-group-hdf5, 11 November 2026.