CVE-2026-48819

CVE-2026-48819 affects the Hey API openapi-ts code generator. Prior to version 0.97.3, the generated template in dist/clients/core/params.ts copies a runtime template into SDKs (params.gen.ts). The function buildClientParams writes unknown keys with slot prefixes (notably $query_) directly into s...

CVE-2026-48819 Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key

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...

CVE-2026-48819 Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key

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...

CVE-2026-48819 Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key

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...