{"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":"2026-10-05T20:01:40.650Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-05T20:01:32.154661Z","id":"CVE-2026-103036","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-05T20:01:40.650Z"}}]}}