fkie_cve-2026-61782

Rsdoctor is a build analyzer tailored for projects built with Rspack. Prior to version 1.5.16, the default Rsdoctor report HTTP server started by `@rsdoctor/rspack-plugin` binds to all network interfaces (`0.0.0.0`) and serves a `POST /api/data/key` endpoint with no authentication and wildcard CORS (`Access-Control-Allow-Origin: *`). Any network-adjacent or remote attacker can send a single unauthenticated request to retrieve the full source code of all compiled JavaScript modules (`moduleCodeMap`), serialized build configuration (`configs`), error details, and other sensitive build metadata. This server is enabled by default in non-CI environments, requiring no special configuration from the victim developer. Version 1.5.16 patches the issue.

GHSA-jmg2-rcxh-w8q3 — @rsdoctor/rspack-plugin has Unauthenticated HTTP API that Exposes Project Source Code and Build Metadata

Affected: npm: @rsdoctor/rspack-plugin

### Summary

The default Rsdoctor report HTTP server started by `@rsdoctor/rspack-plugin` binds to all network interfaces (`0.0.0.0`) and serves a `POST /api/data/key` endpoint with no authentication and wildcard CORS (`Access-Control-Allow-Origin: *`). Any network-adjacent or remote attacker can send a single unauthenticated request to retrieve the full source code of all compiled JavaScript modules (`moduleCodeMap`), serialized build configuration (`configs`), error details, and other sensitive build metadata. This server is enabled by default in non-CI environments, requiring no special configuration from the victim developer.

### Details

**Root cause: server binds to all interfaces with no authentication and no key allowlist.**

The vulnerability is composed of four independently observable defects that together create a complete unauthenticated information-disclosure path:

**1. Server binds to `0.0.0.0` (all interfaces)**

`packages/utils/src/build/server.ts:107` calls `server.listen(port, callback)` without a `host` argument. Node.js defaults to `0.0.0.0`, exposing the server on every network interface of the developer's machine, including LAN interfaces.

```ts // packages/utils/src/build/server.ts:83,107 server.listen(port, () => { // no host → 0.0.0.0 resolve(res); }); ```

**2. Wildcard CORS enabled unconditionally**

`packages/sdk/src/sdk/server/index.ts:106` applies `cors()` middleware with no origin restriction, and `:203–204` additionally sets `Access-Co…

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fkie_cve-2026-61782

GHSA-jmg2-rcxh-w8q3 — @rsdoctor/rspack-plugin has Unauthenticated HTTP API that Exposes Project Source Code and Build Metadata