{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"h5io","product":"h5io","source":"CNA: VulnCheck","vendor":"h5io","versions":[{"lessThan":"0.2.6","status":"affected","version":"0.1.0","versionType":"semver"}]}],"cveId":"CVE-2026-120499","cwes":["CWE-95","CWE-502"],"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.","epss":null,"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737"}],"kev":null,"metrics":[{"score":8.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.8,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793903458290,"publishedAt":1793897732599,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/h5io/h5io/commit/afff1d61b31790f8c27e6c577bb7703eb1883ddd"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/h5io/h5io/releases/tag/h5io-0.2.6"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/h5io/h5io/blob/h5io-0.2.5/h5io/_h5io.py#L601-L604"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/h5io-before-0.2.6-arbitrary-code-execution-via-read-hdf5"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/h5io/h5io/commit/afff1d61b31790f8c27e6c577bb7703eb1883ddd"}],"revision":"064a41f63f4fe0488e3813be523b7343d0006c96ead1b9a67785dd0ec39143a1","sources":[{"modifiedAt":1793903458290,"name":"CNA: VulnCheck","retrievedAt":1793905784276,"url":"https://www.cve.org/CVERecord?id=CVE-2026-120499"}],"ssvc":{"assessedAt":1793903402460,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"h5io before 0.2.6 Arbitrary Code Execution via read_hdf5","updatedAt":1793905784276}