CVE-2026-120499
Published:November 05, 2026
Updated:November 09, 2026
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.
Affected Packages
h5io (CONDA):
Affected version(s) >=0.1.0 <0.2.6Fix Suggestion:
Update to version 0.2.6https://github.com/h5io/h5io.git (GITHUB):
Affected version(s) >=h5io-0.1.0 <h5io-0.2.6Fix Suggestion:
Update to version h5io-0.2.6h5io (PYTHON):
Affected version(s) =0.post0.dev110 <0.2.6 || >=0.0.2 <0.2.6Fix Suggestion:
Update to version 0.2.6Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
EPSS
Base Score:
0.42