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CVE-2026-120499 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737	CISA-ADP
https://github.com/h5io/h5io/blob/h5io-0.2.5/h5io/_h5io.py#L601-L604	[email protected]
https://github.com/h5io/h5io/commit/afff1d61b31790f8c27e6c577bb7703eb1883ddd	[email protected]
https://github.com/h5io/h5io/releases/tag/h5io-0.2.6	[email protected]
https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737	[email protected]
https://www.vulncheck.com/advisories/h5io-before-0.2.6-arbitrary-code-execution-via-read-hdf5	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-502	Deserialization of Untrusted Data	[email protected]
CWE-95	Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 5, 2026	CVE Modified	CISA-ADP
Nov 5, 2026	New CVE Received	[email protected]