{"cve":"CVE-2026-54269","nvd":{"published":"2026-06-22T18:16:45.350","modified":"2026-10-25T23:10:00.167","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-674","CWE-754"],"references":["https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-f38q-mgvj-vph7"],"products":["protobufjs_project:protobufjs","protobufjs_project:protobufjs-cli"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-54269","score":0.00402,"percentile":0.34193,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-f38q-mgvj-vph7","url":"https://osv.dev/vulnerability/GHSA-f38q-mgvj-vph7","summary":"protobufjs : Schema-derived names can shadow runtime-significant properties","modified":"2026-09-10T03:50:49.279849641Z","packages":[{"ecosystem":"npm","name":"protobufjs","purl":"pkg:npm/protobufjs","ranges":["<7.6.3"],"fixed":["7.6.3"]},{"ecosystem":"npm","name":"protobufjs-cli","purl":"pkg:npm/protobufjs-cli","ranges":[">=2.0.0 <2.5.1"],"fixed":["2.5.1"]},{"ecosystem":"npm","name":"protobufjs-cli","purl":"pkg:npm/protobufjs-cli","ranges":["<1.3.3"],"fixed":["1.3.3"]},{"ecosystem":"npm","name":"protobufjs","purl":"pkg:npm/protobufjs","ranges":[">=8.0.0 <8.6.0"],"fixed":["8.6.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}