{
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "OpenSSL",
                    "vendor": "OpenSSL",
                    "versions": [
                        {
                            "lessThan": "3.6.2",
                            "status": "affected",
                            "version": "3.6.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "3.5.6",
                            "status": "affected",
                            "version": "3.5.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "3.4.5",
                            "status": "affected",
                            "version": "3.4.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "3.3.7",
                            "status": "affected",
                            "version": "3.3.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "3.0.20",
                            "status": "affected",
                            "version": "3.0.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "1.1.1zg",
                            "status": "affected",
                            "version": "1.1.1",
                            "versionType": "custom"
                        },
                        {
                            "lessThan": "1.0.2zp",
                            "status": "affected",
                            "version": "1.0.2",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Nathan Sportsman (Praetorian)"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Daniel Rhea"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Jaeho Nam (Seoul National University)"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Muhammad Daffa"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Zhanpeng Liu (Tencent Xuanwu Lab)"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Guannan Wang (Tencent Xuanwu Lab)"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Guancheng Li (Tencent Xuanwu Lab)"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Joshua Rogers (Aisle Research)"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Neil Horman"
                }
            ],
            "datePublic": "2026-04-07T14:00:00.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "Issue summary: During processing of a crafted CMS EnvelopedData message<br>with KeyAgreeRecipientInfo a NULL pointer dereference can happen.<br><br>Impact summary: Applications that process attacker-controlled CMS data may<br>crash before authentication or cryptographic operations occur resulting in<br>Denial of Service.<br><br>When a CMS EnvelopedData message that uses KeyAgreeRecipientInfo is<br>processed, the optional parameters field of KeyEncryptionAlgorithmIdentifier<br>is examined without checking for its presence. This results in a NULL<br>pointer dereference if the field is missing.<br><br>Applications and services that call CMS_decrypt() on untrusted input<br>(e.g., S/MIME processing or CMS-based protocols) are vulnerable.<br><br>The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this<br>issue, as the affected code is outside the OpenSSL FIPS module boundary."
                        }
                    ],
                    "value": "Issue summary: During processing of a crafted CMS EnvelopedData message\nwith KeyAgreeRecipientInfo a NULL pointer dereference can happen.\n\nImpact summary: Applications that process attacker-controlled CMS data may\ncrash before authentication or cryptographic operations occur resulting in\nDenial of Service.\n\nWhen a CMS EnvelopedData message that uses KeyAgreeRecipientInfo is\nprocessed, the optional parameters field of KeyEncryptionAlgorithmIdentifier\nis examined without checking for its presence. This results in a NULL\npointer dereference if the field is missing.\n\nApplications and services that call CMS_decrypt() on untrusted input\n(e.g., S/MIME processing or CMS-based protocols) are vulnerable.\n\nThe FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this\nissue, as the affected code is outside the OpenSSL FIPS module boundary."
                }
            ],
            "metrics": [
                {
                    "format": "other",
                    "other": {
                        "content": {
                            "text": "Low"
                        },
                        "type": "https://openssl-library.org/policies/general/security-policy/"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-476",
                            "description": "CWE-476 NULL Pointer Dereference",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "00000000-0000-4000-9000-000000000000",
                "shortName": "openssl"
            },
            "references": [
                {
                    "name": "OpenSSL Advisory",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://openssl-library.org/news/secadv/20260407.txt"
                },
                {
                    "name": "3.6.2 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/f80f83bc5fd036bc47d773e8b15a001e2b4ce686"
                },
                {
                    "name": "3.5.6 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/16cea4188e0ea567deb4f93f85902247e67384f5"
                },
                {
                    "name": "3.4.5 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/785cbf7ea3b5a6f5adf0c1ccb92b79d89c35c616"
                },
                {
                    "name": "3.3.7 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/c6725634e089eb2b634b10ede33944be7248172a"
                },
                {
                    "name": "3.0.20 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/7b5274e812400cacb6f3be4c2df5340923fa807f"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Possible NULL Dereference When Processing CMS KeyAgreeRecipientInfo",
            "x_generator": {
                "engine": "Vulnogram 0.2.0"
            }
        }
    },
    "cveMetadata": {
        "assignerOrgId": "00000000-0000-4000-9000-000000000000",
        "cveId": "CVE-2026-28389",
        "requesterUserId": "00000000-0000-4000-9000-000000000000",
        "serial": 1,
        "state": "PUBLISHED"
    },
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1"
}