bsv-sdk and bsv-wallet persist unverified certifier signatures in acquire_certificate (direct and issuance paths)_CVE-2026-40070

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-04-09T17:26:51.495Z",
    "modified": "2026-04-09T17:26:51.495Z",
    "type": "cve",
    "title": "bsv-sdk and bsv-wallet persist unverified certifier signatures in acquire_certificate (direct and issuance paths)",
    "source": "GitHub_M",
    "references": "https://github.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-hc36-c89j-5f4j\nhttps://github.com/sgbett/bsv-ruby-sdk/issues/305\nhttps://github.com/sgbett/bsv-ruby-sdk/pull/306\nhttps://github.com/sgbett/bsv-ruby-sdk/commit/4992e8a265fd914a7eeb0405c69d1ff0122a84cc\nhttps://brc.dev/52",
    "id": "CVE-2026-40070",
    "bulletinFamily": "",
    "cwe": [
        "CWE-347"
    ],
    "cvelist": null,
    "sourceData": "sgbett bsv-ruby-sdk >= 0.3.1, < 0.8.2\nsgbett bsv-sdk >= 0.3.1, < 0.8.2\nsgbett bsv-wallet >= 0.1.2, < 0.3.4",
    "sourceHref": "",
    "cvss": {
        "score": 8.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "bsv-ruby-sdk",
    "version": ">= 0.3.1, < 0.8.2",
    "vendor": "sgbett",
    "ai_description": "",
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    "ai_score": 0
}