{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-54580",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-15T19:15:27.344Z",
        "datePublished": "2026-09-17T16:51:29.785Z",
        "dateUpdated": "2026-09-24T20:55:22.459Z"
    },
    "containers": {
        "cna": {
            "title": "mport index decompression can leave partial or corrupt index data after zstd failures",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-354",
                            "lang": "en",
                            "description": "CWE-354: Improper Validation of Integrity Check Value",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-755",
                            "lang": "en",
                            "description": "CWE-755: Improper Handling of Exceptional Conditions",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.3,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w"
                },
                {
                    "name": "https://github.com/MidnightBSD/mport/pull/135",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/MidnightBSD/mport/pull/135"
                },
                {
                    "name": "https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d"
                },
                {
                    "name": "https://github.com/MidnightBSD/mport/releases/tag/2.7.8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/MidnightBSD/mport/releases/tag/2.7.8"
                }
            ],
            "affected": [
                {
                    "vendor": "MidnightBSD",
                    "product": "mport",
                    "versions": [
                        {
                            "version": "< 2.7.8",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-17T16:51:29.785Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8."
                }
            ],
            "source": {
                "advisory": "GHSA-ffqj-j42r-747w",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-54580",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-09-24T20:37:31.208937Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-24T20:55:22.459Z"
                }
            }
        ]
    }
}