CVE-2026-48819

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

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

creationtimestamp| type| source ---|---|--- 2026-07-01 22:35:16+00:00| published-proof-of-concept| https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw...