protobufjs: Schema-derived names can shadow runtime-significant properties_CVE-2026-54269

{
    "lastseen": "",
    "description": "protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 8.6.0 and 7.6.3, protobufjs accepted certain schema-derived names that could collide with properties used by protobufjs runtime helpers. The known affected names are fields named hasOwnProperty, field or oneof names such as $type when loaded through protobufjs JSON/reflection descriptors, and service methods whose generated helper name is rpcCall. When affected message or service types were used, protobufjs could read schema-controlled data where it expected an own-property helper, reflected type metadata, or the base RPC helper. This could cause deterministic exceptions or recursive calls in affected decode post-checks, verification, object conversion, reflected JSON serialization, or protobufjs RPC helper invocation. This vulnerability is fixed in 8.6.0 and 7.6.3.",
    "published": "2026-06-22T16:23:24.383Z",
    "modified": "2026-06-22T16:23:24.383Z",
    "type": "cve",
    "title": "protobufjs: Schema-derived names can shadow runtime-significant properties",
    "source": "GitHub_M",
    "references": "https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-f38q-mgvj-vph7",
    "id": "CVE-2026-54269",
    "bulletinFamily": "",
    "cwe": [
        "CWE-674",
        "CWE-754"
    ],
    "cvelist": null,
    "sourceData": "protobufjs protobuf.js < 7.6.3\nprotobufjs protobuf.js >= 8.0.0, < 8.6.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "protobuf.js",
    "version": "< 7.6.3",
    "vendor": "protobufjs",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}