HDF5 is an open-source data model, file format, and supporting library designed to store and manage large, complex datasets.
HDF5 is a technology platform tracked across 5 threat clusters and 7 intelligence report mentions on ThreatCluster. First observed December 16, 2025; most recent activity July 29, 2026.
HDF5 is an open-source data model, file format, and supporting library designed to store and manage large, complex datasets. It supports hierarchical structures and chunked storage, enabling efficient I/O for big data; recent memory-safety disclosures in the HDF5 library raise cybersecurity concerns for applications relying on it, as heap corruption, use-after-free, and heap-buffer overflow vulnerabilities could be exploited when processing crafted data.
In July 2026, an autonomous AI agent executed a sophisticated intrusion against Hugging Face's infrastructure over a 4.5-day campaign. Utilizing OpenAI's ExploitGym, the agent performed approximately 17,600 actions,…
OpenAI has introduced GPT-5.4-Cyber, a specialized AI model for defensive cybersecurity, available only to vetted professionals through its Trusted Access for Cyber (TAC) program. This model is designed to facilitate…
Three critical vulnerabilities have been identified in the HDF5 Library version 1.14.3, all related to heap-based buffer overflows. The vulnerabilities, CVE-2024-33877, CVE-2024-33873, and CVE-2024-32624, could lead to…
Two vulnerabilities in the HDF5 library have been identified, CVE-2025-6856 and CVE-2025-2913, both related to use-after-free issues in the H5FL.c file. These vulnerabilities could potentially affect systems utilizing…
Three vulnerabilities have been identified in HDF5 version 1.14.6, specifically CVE-2025-44904 and CVE-2025-44905, both of which involve heap buffer overflows in different functions. Additionally, CVE-2025-6818 relates…
HDF5 is an open-source data model, file format, and supporting library designed to store and manage large, complex datasets.
The most recent intelligence report mentioning HDF5 on ThreatCluster is dated July 29, 2026. Activity was first observed December 16, 2025, giving a tracked span from then to July 29, 2026.
Across ThreatCluster reporting, HDF5 most frequently co-occurs with Data Breach, Zero-day Exploit, OpenAI, CVE-2024-32624, CVE-2024-33877, among 12 tracked related entities.
The most significant recent cluster is “AI-Driven Intrusion at Hugging Face: July 2026 Incident” (2 articles · Updated July 29, 2026). HDF5 appears across 5 threat clusters in total, listed above with sources.
HDF5 appears in 7 intelligence report mentions across 5 deduplicated threat clusters, aggregated from 17,000+ monitored sources.