CVE-2026-120499 (GCVE-0-2026-120499)
Vulnerability from cvelistv5 – Published: 2026-11-05 16:55 – Updated: 2026-11-05 18:30
VLAI
EPSS
VEX
Title
h5io before 0.2.6 Arbitrary Code Execution via read_hdf5
Summary
h5io before 0.2.6 contains a code injection vulnerability in read_hdf5() that allows attackers to execute arbitrary code by supplying a crafted HDF5 file. Attackers can store Python code in a node titled timezone, which _triage_read() passes to eval() with builtins reachable, name an arbitrary module in class or custom-object nodes that _import_class() imports, or place pickled objects in pd_dataframe or pd_series nodes that pandas deserializes on read.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 18:30 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/h5io/h5io/security/advisories/… | vendor-advisory |
| https://github.com/h5io/h5io/commit/afff1d61b3179… | patch |
| https://github.com/h5io/h5io/releases/tag/h5io-0.2.6 | release-notes |
| https://github.com/h5io/h5io/blob/h5io-0.2.5/h5io… | technical-description |
| https://www.vulncheck.com/advisories/h5io-before-… | third-party-advisory |
Impacted products
Date Public
2026-11-05 16:19
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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