{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43820",
        "assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
        "state": "PUBLISHED",
        "assignerShortName": "apple",
        "dateReserved": "2026-05-01T22:46:27.822Z",
        "datePublished": "2026-07-23T14:33:20.551Z",
        "dateUpdated": "2026-07-24T20:09:49.866Z"
    },
    "containers": {
        "cna": {
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "NIOSSLCertificate._subjectAlternativeNames provides access to the raw bytes for a cert's SANs. NIOSSL provides access to a buffer assumed to be backed by an ASN1_STRING, but not all SANs are backed by ASN1_STRING, so accessing the buffer for such a type can lead to out-of-bounds memory access."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Apple",
                    "product": "swift-nio-ssl",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "2.37.2",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "NIOSSLCertificate._subjectAlternativeNames provides access to the raw bytes for a cert's SANs. NIOSSL provides access to a buffer assumed to be backed by an ASN1_STRING, but not all SANs are backed by ASN1_STRING, so accessing the buffer for such a type can lead to out-of-bounds memory access. This vulnerability is addressed in swift-nio-ssl version 2.37.2."
                }
            ],
            "references": [
                {
                    "url": "https://github.com/apple/swift-nio-ssl/security/advisories/GHSA-xfxg-9975-pc2j"
                }
            ],
            "providerMetadata": {
                "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
                "shortName": "apple",
                "dateUpdated": "2026-07-23T14:33:20.551Z"
            }
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-125",
                                "lang": "en",
                                "description": "CWE-125 Out-of-bounds Read"
                            }
                        ]
                    }
                ],
                "references": [
                    {
                        "url": "https://github.com/apple/swift-nio-ssl/security/advisories/GHSA-xfxg-9975-pc2j",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.7,
                            "attackVector": "LOCAL",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-24T20:09:17.611102Z",
                                "id": "CVE-2026-43820",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-24T20:09:49.866Z"
                }
            }
        ]
    }
}