{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103036", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-29T21:13:24.032Z", "datePublished": "2026-10-02T19:59:23.947Z", "dateUpdated": "2026-10-02T20:00:46.620Z"}, "containers": {"cna": {"title": "@orpc/json-schema: Prototype injection in smart coercion", "problemTypes": [{"descriptions": [{"cweId": "CWE-915", "lang": "en", "description": "CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1321", "lang": "en", "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/middleapi/orpc/security/advisories/GHSA-4h5r-cv8j-4456", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/middleapi/orpc/security/advisories/GHSA-4h5r-cv8j-4456"}, {"name": "https://github.com/middleapi/orpc/pull/1726", "tags": ["x_refsource_MISC"], "url": "https://github.com/middleapi/orpc/pull/1726"}, {"name": "https://github.com/middleapi/orpc/commit/8a352622e756e8956311f5836cd5c5b9219c0666", "tags": ["x_refsource_MISC"], "url": "https://github.com/middleapi/orpc/commit/8a352622e756e8956311f5836cd5c5b9219c0666"}, {"name": "https://github.com/middleapi/orpc/releases/tag/v1.14.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/middleapi/orpc/releases/tag/v1.14.9"}], "affected": [{"vendor": "middleapi", "product": "orpc", "versions": [{"version": "< 1.14.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-02T20:00:46.620Z"}, "descriptions": [{"lang": "en", "value": "oRPC is a tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to 1.14.9, the @orpc/json-schema SmartCoercionPlugin uses JsonSchemaCoercer to collect object properties in a plain object and to resolve schema.properties entries through the prototype chain. A remote client that can reach a procedure with an object input schema can supply __proto__ to replace the prototype of the single coerced request object, or supply Object.prototype member names such as constructor and toString so inherited values are treated as sub-schemas and pass the coercer's satisfaction check. Attacker-controlled inherited properties can consequently affect handler, Object.assign, or configuration lookups, while legitimate __proto__ properties are dropped. The global Object.prototype, unrelated objects, other requests, and other users are not modified, and downstream schema validation still runs. This issue is fixed in version 1.14.9."}], "source": {"advisory": "GHSA-4h5r-cv8j-4456", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "orpc", "vendor": "middleapi", "versions": [{"status": "affected", "version": "< 1.14.9"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "oRPC is a tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to 1.14.9, the @orpc/json-schema SmartCoercionPlugin uses JsonSchemaCoercer to collect object properties in a plain object and to resolve schema.properties entries through the prototype chain. A remote client that can reach a procedure with an object input schema can supply __proto__ to replace the prototype of the single coerced request object, or supply Object.prototype member names such as constructor and toString so inherited values are treated as sub-schemas and pass the coercer's satisfaction check. Attacker-controlled inherited properties can consequently affect handler, Object.assign, or configuration lookups, while legitimate __proto__ properties are dropped. The global Object.prototype, unrelated objects, other requests, and other users are not modified, and downstream schema validation still runs. This issue is fixed in version 1.14.9."}], "id": "CVE-2026-103036", "lastModified": "2026-10-02T20:16:59.567", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-02T20:16:59.567", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/middleapi/orpc/commit/8a352622e756e8956311f5836cd5c5b9219c0666"}, {"source": "security-advisories@github.com", "url": "https://github.com/middleapi/orpc/pull/1726"}, {"source": "security-advisories@github.com", "url": "https://github.com/middleapi/orpc/releases/tag/v1.14.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/middleapi/orpc/security/advisories/GHSA-4h5r-cv8j-4456"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-915"}, {"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}