{"id":"CVE-2026-48819","sourceIdentifier":"security-advisories@github.com","published":"2026-07-17T20:17:21.553","lastModified":"2026-10-24T20:10:00.137","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Hey API is an ecosystem for turning API specifications into production-ready code. Prior to 0.97.3, dist/clients/core/params.ts ships a runtime template copied into generated SDKs as params.gen.ts, and buildClientParams writes unknown slot-prefixed keys such as $body_, $headers_, $path_, and $query_ directly to the corresponding slot, allowing $query___proto__ alongside a legitimate q field to set params.query through params[\"query\"][\"__proto__\"] = value, call Object.setPrototypeOf(params.query, value), and expose inherited attacker-controlled keys during for..in iteration. This issue is fixed in version 0.97.3."},{"lang":"es","value":"Hey API es un ecosistema para convertir especificaciones de API en código listo para producción. Antes de la 0.97.3, dist/clients/core/params.ts envía una plantilla en tiempo de ejecución copiada en los SDK generados como params.gen.ts, y buildClientParams escribe claves desconocidas con prefijo de slot como $body_, $headers_, $path_ y $query_ directamente al slot correspondiente, permitiendo que $query___proto__ junto con un campo q legítimo establezca params.query a través de params[’query’][’__proto__’] = value, llame a Object.setPrototypeOf(params.query, value), y exponga claves heredadas controladas por el atacante durante la iteración for..in. Este problema está solucionado en la versión 0.97.3."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"hey-api","product":"openapi-ts","versions":[{"version":"< 0.97.3","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","baseScore":4.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":2.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-20T16:23:29.690460Z","id":"CVE-2026-48819","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-1321"}]}],"references":[{"url":"https://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214f","source":"security-advisories@github.com"},{"url":"https://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169","source":"security-advisories@github.com"},{"url":"https://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3","source":"security-advisories@github.com"},{"url":"https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw","source":"security-advisories@github.com"},{"url":"https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}