{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-120499", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-02T15:06:46.389Z", "datePublished": "2026-11-05T16:55:32.599Z", "dateUpdated": "2026-11-05T16:55:32.599Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-05T16:55:32.599Z"}, "datePublic": "2026-11-05T16:19:44.000Z", "title": "h5io before 0.2.6 Arbitrary Code Execution via read_hdf5", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')", "cweId": "CWE-95", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "description": "Deserialization of Untrusted Data", "cweId": "CWE-502", "type": "CWE"}]}], "affected": [{"vendor": "h5io", "product": "h5io", "packageURL": "pkg:pypi/h5io", "repo": "https://github.com/h5io/h5io", "defaultStatus": "unaffected", "versions": [{"version": "0.1.0", "status": "affected", "versionType": "semver", "lessThan": "0.2.6"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.5, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-vwvw-f6v4-w737)"}, {"url": "https://github.com/h5io/h5io/commit/afff1d61b31790f8c27e6c577bb7703eb1883ddd", "tags": ["patch"]}, {"url": "https://github.com/h5io/h5io/releases/tag/h5io-0.2.6", "tags": ["release-notes"], "name": "h5io h5io-0.2.6 Release Notes"}, {"url": "https://github.com/h5io/h5io/blob/h5io-0.2.5/h5io/_h5io.py#L601-L604", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: h5io before 0.2.6 Arbitrary Code Execution via read_hdf5", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/h5io-before-0.2.6-arbitrary-code-execution-via-read-hdf5"}], "credits": [{"lang": "en", "value": "Dilanka Kaushal Hewage (r3vpwnx)", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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