{"id":"CVE-2026-54269","summary":"protobufjs: Schema-derived names can shadow runtime-significant properties","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.","aliases":["GHSA-f38q-mgvj-vph7"],"modified":"2026-06-24T03:54:01.600525067Z","published":"2026-06-22T16:23:24.383Z","related":["CGA-95xc-j44m-fm48"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54269.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-674","CWE-754"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/protobufjs/protobuf.js","events":[{"introduced":"0"},{"fixed":"1d3796d7d29830c73eec792ccbe769be6aa020ac"},{"introduced":"933e8750dcd000c16a621a7344a4beaa034c4019"},{"fixed":"8631d9b8aaad5d686cc7f374f143f3872f55e9cd"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"7.6.3"},{"introduced":"8.0.0"},{"fixed":"8.6.0"}]}}],"versions":["protobufjs-v7.6.2","protobufjs-cli-v1.3.2","protobufjs-v8.5.0","protobufjs-cli-v2.5.0","utf8-v1.1.1","protobufjs-v7.6.1","protobufjs-cli-v1.3.1","pool-v1.1.0","path-v1.1.2","float-v1.0.2","eventemitter-v1.1.1","codegen-v2.0.5","base64-v1.1.2","aspromise-v1.1.2","protobufjs-v8.4.2","protobufjs-cli-v2.4.2","protobufjs-v8.4.1","protobufjs-cli-v2.4.1","protobufjs-v7.6.0","protobufjs-cli-v1.3.0","protobufjs-v8.4.0","protobufjs-cli-v2.4.0","protobufjs-v7.5.9","inquire-v1.1.2","fetch-v1.1.1","protobufjs-v7.5.8","protobufjs-v8.3.0","protobufjs-cli-v2.3.0","protobufjs-v8.2.1","protobufjs-cli-v2.2.1","protobufjs-v7.5.7","protobufjs-v8.2.0","protobufjs-cli-v2.2.0","protobufjs-cli-v1.2.2","protobufjs-cli-v2.0.3","protobufjs-v7.5.6","protobufjs-cli-v1.2.1","protobufjs-v8.0.3","protobufjs-v8.0.2","protobufjs-cli-v2.0.2","protobufjs-v7.5.5","protobufjs-v8.0.1","protobufjs-cli-v2.0.1","protobufjs-v7.5.4","protobufjs-v8.0.0","protobufjs-cli-v2.0.0","protobufjs-v7.5.3","protobufjs-v7.5.2","protobufjs-v7.5.1","protobufjs-v7.5.0","protobufjs-cli-v1.2.0","protobufjs-v7.4.0","protobufjs-cli-v1.1.4","protobufjs-v7.3.3","protobufjs-cli-v1.1.3","protobufjs-v7.3.2","protobufjs-v7.3.1","protobufjs-v7.3.0","protobufjs-v7.2.6","protobufjs-v7.2.5","protobufjs-cli-v1.1.2","protobufjs-v7.2.4","protobufjs-v7.2.3","protobufjs-v7.2.2","protobufjs-v7.2.1","protobufjs-cli-v1.1.1","protobufjs-v7.2.0","protobufjs-cli-v1.1.0","protobufjs-v7.1.2","protobufjs-v7.1.1","protobufjs-cli-v1.0.2","protobufjs-v7.1.0","protobufjs-cli-v1.0.1","protobufjs-v7.0.0","protobufjs-cli-v1.0.0","v6.10.2","v6.10.1","v6.10.1-beta.0","v6.10.0","v6.10.0-beta.2","v6.10.0-beta.1","v6.10.0-beta.0","v6.9.0","v6.9.0-beta.0","6.8.8","6.8.7","6.8.6","6.8.5","6.8.4","6.8.3","6.8.2","6.8.1","6.8.0","6.7.3","6.7.2","6.7.1","6.7.0","6.6.5","6.6.4","6.6.3","6.6.2","6.6.1","6.6.0","6.5.3","6.5.2","6.5.1","6.5.0","6.4.6","6.4.5","6.4.4","6.4.3","6.4.2","6.4.1","6.4.0","6.3.1","6.3.0","6.2.1","6.2.0","6.1.1","6.1.0","6.0.2","6.0.1","6.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-54269.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}