{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:protobufjs_project:protobufjs:*:*:*:*:*:node.js:*:*",
              "cpe:2.3:a:protobufjs_project:protobufjs-cli:*:*:*:*:*:node.js:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "7.6.3"
              },
              {
                "fixed": "1.3.3"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.6.0"
              },
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.5.1"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1d3796d7d29830c73eec792ccbe769be6aa020ac"
            },
            {
              "introduced": "933e8750dcd000c16a621a7344a4beaa034c4019"
            },
            {
              "fixed": "8631d9b8aaad5d686cc7f374f143f3872f55e9cd"
            }
          ],
          "repo": "https://github.com/protobufjs/protobuf.js",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f38q-mgvj-vph7"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-674",
      "CWE-754"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54269.json"
  },
  "details": "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.",
  "id": "CVE-2026-54269",
  "modified": "2026-07-15T01:48:54.073027914Z",
  "published": "2026-06-22T16:23:24.383Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54269.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-f38q-mgvj-vph7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54269"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "protobufjs: Schema-derived names can shadow runtime-significant properties"
}