{"id":"CVE-2026-54269","sourceIdentifier":"security-advisories@github.com","published":"2026-06-22T18:16:45.350","lastModified":"2026-06-24T20:40:20.407","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"protobufjs","product":"protobuf.js","versions":[{"version":"< 7.6.3","status":"affected"},{"version":">= 8.0.0, < 8.6.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-23T16:07:04.844722Z","id":"CVE-2026-54269","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-674"},{"lang":"en","value":"CWE-754"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:protobufjs_project:protobufjs:*:*:*:*:*:node.js:*:*","versionEndExcluding":"7.6.3","matchCriteriaId":"63CB499F-BC12-4D70-BD4A-38BD2CE92D99"},{"vulnerable":true,"criteria":"cpe:2.3:a:protobufjs_project:protobufjs:*:*:*:*:*:node.js:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.6.0","matchCriteriaId":"287A0FDC-7F44-4088-A0B2-51859135AB3E"},{"vulnerable":true,"criteria":"cpe:2.3:a:protobufjs_project:protobufjs-cli:*:*:*:*:*:node.js:*:*","versionEndExcluding":"1.3.3","matchCriteriaId":"E1117BF5-FD6A-4DDC-A5A3-681CD7FA937D"},{"vulnerable":true,"criteria":"cpe:2.3:a:protobufjs_project:protobufjs-cli:*:*:*:*:*:node.js:*:*","versionStartIncluding":"2.0.0","versionEndExcluding":"2.5.1","matchCriteriaId":"77B18CCF-6A37-4D44-822B-B0102CE8F496"}]}]}],"references":[{"url":"https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-f38q-mgvj-vph7","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}