CVE-2026-120499
h5io before 0.2.6 contains a code injection vulnerability in read_hdf5() that allows attackers to…
- Risk score
- 47/100
- CVSS
- 7.8 v3.1
- Published
- 5 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 custo…
- Affected
- See advisory
- Fix
- Upgrade the product to 0.2.6 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.8 high
References
- https://github.com/h5io/h5io/blob/h5io-0.2.5/h5io/_h5io.py#L601-L604
- https://github.com/h5io/h5io/commit/afff1d61b31790f8c27e6c577bb7703eb1883ddd
- https://github.com/h5io/h5io/releases/tag/h5io-0.2.6
- https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737
- https://www.vulncheck.com/advisories/h5io-before-0.2.6-arbitrary-code-execution-via-read-hdf5
Original 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.
Last activity 5 Nov 2026. Patch Forecast updates every hour.