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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-19026",
        "assignerOrgId": "0253b833-3e77-4dfe-9d57-17db1a2f0a74",
        "state": "PUBLISHED",
        "assignerShortName": "HDFG",
        "dateReserved": "2026-08-05T22:14:40.349Z",
        "datePublished": "2026-08-05T22:47:58.227Z",
        "dateUpdated": "2026-08-06T14:31:59.795Z"
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                "shortName": "HDFG",
                "dateUpdated": "2026-08-05T22:47:58.227Z"
            },
            "title": "Nbit filter NULL/short parameter-array dereference",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-476",
                            "description": "CWE-476 NULL pointer dereference",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-1284",
                            "description": "CWE-1284 Improper validation of specified quantity in input",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-165",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-165 File Manipulation"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "The HDF Group",
                    "product": "HDF5",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "<=2.3.0"
                        }
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                    "lang": "en",
                    "value": "H5Z__filter_nbit in H5Znbit.c in HDF5 through 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter's header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.",
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                            "value": "H5Z__filter_nbit in H5Znbit.c in HDF5 through 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter's header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.<br><br><br>"
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            ],
            "references": [
                {
                    "url": "https://github.com/HDFGroup/hdf5/pull/6497"
                },
                {
                    "url": "https://github.com/HDFGroup/hdf5/issues/6489"
                },
                {
                    "url": "https://github.com/HDFGroup/hdf5/issues/6492"
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                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.8,
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
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            "source": {
                "discovery": "UNKNOWN"
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                    {
                        "url": "https://github.com/HDFGroup/hdf5/issues/6489",
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                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-06T14:31:41.789584Z",
                                "id": "CVE-2026-19026",
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                                        "Exploitation": "poc"
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                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-06T14:31:59.795Z"
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