{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-40070",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-09T00:39:12.204Z",
        "datePublished": "2026-04-09T17:26:51.495Z",
        "dateUpdated": "2026-04-13T15:38:58.154Z"
    },
    "containers": {
        "cna": {
            "title": "bsv-sdk and bsv-wallet persist unverified certifier signatures in acquire_certificate (direct and issuance paths)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-347",
                            "lang": "en",
                            "description": "CWE-347: Improper Verification of Cryptographic Signature",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 8.1,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-hc36-c89j-5f4j",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-hc36-c89j-5f4j"
                },
                {
                    "name": "https://github.com/sgbett/bsv-ruby-sdk/issues/305",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sgbett/bsv-ruby-sdk/issues/305"
                },
                {
                    "name": "https://github.com/sgbett/bsv-ruby-sdk/pull/306",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sgbett/bsv-ruby-sdk/pull/306"
                },
                {
                    "name": "https://github.com/sgbett/bsv-ruby-sdk/commit/4992e8a265fd914a7eeb0405c69d1ff0122a84cc",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sgbett/bsv-ruby-sdk/commit/4992e8a265fd914a7eeb0405c69d1ff0122a84cc"
                },
                {
                    "name": "https://brc.dev/52",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://brc.dev/52"
                }
            ],
            "affected": [
                {
                    "vendor": "sgbett",
                    "product": "bsv-ruby-sdk",
                    "versions": [
                        {
                            "version": ">= 0.3.1, < 0.8.2",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "sgbett",
                    "product": "bsv-sdk",
                    "versions": [
                        {
                            "version": ">= 0.3.1, < 0.8.2",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "sgbett",
                    "product": "bsv-wallet",
                    "versions": [
                        {
                            "version": ">= 0.1.2, < 0.3.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-09T17:26:51.495Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "BSV Ruby SDK is the Ruby SDK for the BSV blockchain. From 0.3.1 to before 0.8.2, BSV::Wallet::WalletClient#acquire_certificate persists certificate records to storage without verifying the certifier's signature over the certificate contents. In acquisition_protocol: 'direct', the caller supplies all certificate fields (including signature:) and the record is written to storage verbatim. In acquisition_protocol: 'issuance', the client POSTs to a certifier URL and writes whatever signature the response body contains, also without verification. An attacker who can reach either API (or who controls a certifier endpoint targeted by the issuance path) can forge identity certificates that subsequently appear authentic to list_certificates and prove_certificate."
                }
            ],
            "source": {
                "advisory": "GHSA-hc36-c89j-5f4j",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-hc36-c89j-5f4j",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-13T15:29:59.716749Z",
                                "id": "CVE-2026-40070",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-13T15:38:58.154Z"
                }
            }
        ]
    }
}